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πŸ”’phosphor.dev
Phosphor
104 design seeds. One button. Zero design skills required.

Your product works. Now make it beautiful.

SeedFlip gives you curated design seeds β€” fonts, colors, shadows, the works β€” applied to a real page in one click. Export as CSS, Tailwind, shadcn/ui, or a complete DESIGN.md your AI agent actually understands. Or plug it straight into your editor with the MCP server.

β€œConsider me flipped.”

β€” @nikkimitss, Passive Studios

Flip β†’
Watch it work ↓

Works with your stack

104
CURATED SEEDS
98
PREMIUM FREE FONTS
7
EXPORT FORMATS
Aa
Real type pairings.
Google Fonts loaded live. Heading + body combos that actually work together β€” weights, spacing, and scale already dialed in. Not a font picker. A font decision.
β—‘
Complete color systems.
Background, surface, text, muted, accent, accent-soft, borders, gradients. Every seed has 10+ coordinated tokens. Not five swatches on a mood board. A system.
{ }
Ship-ready exports.
CSS Variables. Tailwind Config. shadcn/ui theme. IDE rule files. Or connect the MCP server and let your agent pull seeds directly. Seven formats. Zero guesswork.
β€œ

β€œAI gave every developer the power to build. It did not give them the power to design. The code was never the bottleneck. The design was. It still is.”

CURRENT SEED TYPOGRAPHY
Fira Code
Every seed pairs a heading and body font that actually belong together. Weights, spacing, and scale β€” already decided. You just flip.
LOCK & FLIP
Keep what you love. Flip the rest.
Lock any category β€” type, palette, shape, or atmosphere β€” and flip everything else. Thousands of combinations from 104 curated seeds. PRO
THE LAB
Extract the DNA.
Every way to take your seed home. CSS Variables. Tailwind Config. shadcn/ui theme. IDE rule files for Cursor, Claude, and Windsurf. Or connect the MCP server and let your agent pull seeds on demand.
THE ARCHIVE
104 seeds. All killer. No filler.
Browse every design seed in the collection. Dark, light, neon, editorial, brutalist, minimal β€” each one hand-curated with real Google Fonts and a full DESIGN.md. Your daily flip lands in your inbox every morning.
β€œ

I described the same design to Claude four different times and got four completely different results. Not one of them looked right. The problem was never my prompting. I didn’t have a design seed. I had adjectives. SeedFlip gave me the actual values. First try. Done.

J
Jamie K.
Indie Hacker
β€œ

My cofounder finally said it out loud. β€œThis looks like every other app on Product Hunt.” He was right. Same zinc palette. Same Inter font. Same everything. Pulled a SeedFlip seed into our Tailwind config and the next build looked like a different company made it.

P
Priya S.
Technical Cofounder
β€œ

I’ve shipped six projects and every single one looked like a developer made it. Because one did. Plugged the MCP server into Cursor, told it to pull something editorial and warm. Twenty minutes later I had a product I’d actually screenshot. No designer. No Figma file. Just the right inputs.

M
Marcus C.
Design Engineer

Simple pricing.

Free gets you flipping. Pro gets you shipping.

Free
$0
forever
βœ“ Unlimited flips
βœ“ 104 curated seeds
βœ“ CSS Variables export
βœ“ CLI + MCP server
βœ“ Edit mode
βœ“ Full Archive access
Start Flipping β†’
Just your email. That's it.
Pro
$19/mo
cancel anytime
Everything in Free, plus:
βœ“ Lock fonts, colors, shape & atmosphere
βœ“ DESIGN.md export
βœ“ Tailwind + shadcn/ui exports
Get Pro β†’
DESIGN.md is a complete design system document. Creative direction, exact tokens, and implementation code. Drop it in your repo and your AI builds to spec.

You're one flip away from looking like you hired a designer.

104 curated design seeds. Real fonts. Real color theory. AI-ready prompts that actually work. No Figma file. No design committee. No three-week sprint to pick a gray.

Flip β†’
SEED
Phosphor
VIBE
Glow in the dark.
BEST FOR
terminal-style deployment dashboards with live log streamingcybersecurity threat monitoring interfacesretro gaming stat-tracking leaderboardshacker-culture creative developer portfolios
01all-monospace type creates full terminal immersion
02single-color system with opacity creates variety without chaos
03tight 4px radius mimics real terminal windows
04neon glow shadows make elements emit light
05near-black background maximizes green contrast
Skip if:β€’ you have long-form paragraph content. all-monospace body text takes 25-30% more horizontal space and slows readingβ€’ your users spend 8+ hours daily in the interface. single-color neon green causes visual fatigue in extended sessionsβ€’ you need multiple status colors beyond green. this one-color system has no room for warning amber or error red
104 design seeds. One button. Zero design skills required.

Your product works. Now make it beautiful.

SeedFlip gives you curated design systems β€” fonts, colors, shadows, the works β€” applied to a real page in one click. Export as CSS, Tailwind, or a complete DESIGN.md your agent actually understands.

β€œConsider me flipped.”

β€” @nikkimitss, Passive Studios

Flip β†’
Watch it work ↓

Works with your stack

104
CURATED SEEDS
98
PREMIUM FREE FONTS
7
EXPORT FORMATS
Aa
Real type pairings.
Google Fonts loaded live. Heading + body combos that actually work together β€” weights, spacing, and scale already dialed in. Not a font picker. A font decision.
β—‘
Complete color systems.
Background, surface, text, muted, accent, accent-soft, borders, gradients. Every seed has 10+ coordinated tokens. Not five swatches on a mood board. A system.
{ }
Ship-ready exports.
CSS Variables. Tailwind Config. Or a complete DESIGN.md that tells Cursor exactly what to build. Paste it. Watch it materialize. Take all the credit.
β€œ

β€œEvery AI app has the same auth flow, the same Stripe checkout, and the same shadcn components. Design is the last unfair advantage you haven't used yet.”

CURRENT SEED TYPOGRAPHY
Fira Code
Every seed pairs a heading and body font that actually belong together. Weights, spacing, and scale β€” already decided. You just flip.
LOCK & FLIP
Keep what you love. Flip the rest.
Lock any category β€” type, palette, shape, or atmosphere β€” and flip everything else. Thousands of combinations from 104 curated seeds. PRO
THE LAB
Extract the DNA.
Three ways to take your seed home. CSS Variables for purists. Tailwind Config for the utility-class faithful. Or DESIGN.md. A complete design system document your AI agent can follow from the first component. Paste it into Cursor. Watch a styled site materialize.
THE ARCHIVE
104 seeds. All killer. No filler.
Browse every design system in the collection. Dark, light, neon, editorial, brutalist, minimal β€” each one hand-curated with real Google Fonts and a full DESIGN.md. Your daily flip lands in your inbox every morning.
β€œ

I was mass-prompting Claude at 4am trying to describe the β€œvibe” I wanted. Turns out the vibe was 17 CSS variables I didn’t know existed.

J
Jamie K.
Indie Hacker
β€œ

Sent a SeedFlip export to my cofounder. His response was β€œwhy does our app look like a real company now.” We launched that week.

P
Priya S.
Technical Cofounder
β€œ

Tried the β€œmake my app look like Super Unicorn X, Y, Z” prompts. Didn’t work. This did. Wish I found it 12 projects ago.

M
Marcus C.
Design Engineer

Simple pricing.

Free gets you flipping. Pro gets you shipping.

Free
$0
forever
βœ“ Unlimited flips
βœ“ 104 curated seeds
βœ“ CSS Variables export
βœ“ Full Archive access
Start Flipping β†’
Pro
$19/mo
cancel anytime
Everything in Free, plus:
βœ“ Lock fonts, colors, shape & atmosphere
βœ“ DESIGN.md export
βœ“ Tailwind + shadcn/ui exports
Get Pro β†’

You're one flip away from looking like you hired a designer.

104 curated design seeds. Real fonts. Real color theory. AI-ready prompts that actually work. No Figma file. No design committee. No three-week sprint to pick a gray.

Flip β†’

Phosphor is a terminal emulator that escaped the command line and became a design system. Everything is monospace. Everything glows. The near-black canvas makes the neon green text feel like it's being projected from inside the screen. This isn't dark mode. This is the computer talking back to you.

Most developers have stared at a terminal for thousands of hours and then gone to build their product page using the same Tailwind template as everyone else.

That's the missed opportunity. Your users already trust the terminal aesthetic. They already associate monospace green-on-black with "this person knows what they're doing." Phosphor lets you weaponize that association.

If you're building dev tools, gaming interfaces, or AI products, Phosphor gives you instant credibility. Not borrowed from a brand. Earned from the culture.

The DNA.
Why Phosphor works. Every decision, unpacked.
TYPOGRAPHY
Fira Code
Weight: 600
?
Β·Spacing: -0.01em
?
Β·Fira Code

Fira Code for everything. Headings and body. That's the statement. Most design systems use monospace as a secondary font for code blocks. Phosphor uses it as the entire typographic system. The effect is total immersion. Your product doesn't reference the terminal. It IS the terminal.

Fira Code's programming ligatures add subtle craft that developers notice. Those connected arrows and equal signs feel polished without breaking the raw aesthetic. It's the difference between a hacker's terminal and an engineer's workstation.

PALETTE
background#0C0C0C
surface#141414
text#B3FFB3
muted#689c68
accent#00FF88
border#1A2F1A
?
Chart
?
Status
?
text / bg16.6:1 AA
?
accent / bg14.6:1 AA
?

One color. Green. Every variation in this system is just a different opacity of the same neon green on near-black. That constraint sounds limiting until you see it in practice. The full-brightness green for headings. The half-opacity green for secondary text. The faint green glow on borders. It's a one-color system that creates the illusion of variety through transparency.

The green itself is electric. Not soft sage. Not muted olive. Bright, phosphorescent green. The kind that burns into your retina after you close your laptop. Against the void-black background, it's impossible to ignore.

SHAPE
2px
4px
6px
?
Nearly square corners everywhere. Terminals don't have rounded edges. The tight radius signals function over form. Every container looks like a panel on a control board. This is deliberate restraint. Rounded corners would break the illusion instantly.
ATMOSPHERE
sm
?
md
?
Neon glow
?
Elements don't cast shadows downward. They emit light outward. A green neon glow radiates from cards and containers like a screen in a dark room. The deeper the background, the more the glow matters. Depth isn't created by darkness below. It's created by light within.
Rip This.
Export Phosphor as code, tokens, or a DESIGN.md for your AI agent.
/* Typography */
--font-heading: 'Fira Code', monospace;
--font-body: 'Fira Code', monospace;
--font-heading-weight: 600;
--letter-spacing: -0.01em;
/* Palette */
--color-bg: #0C0C0C;
--color-surface: #141414;
--color-text: #B3FFB3;
--color-text-muted: #689c68;
--color-accent: #00FF88;
--color-accent-soft: rgba(0,255,136,0.08);
--color-border: #1A2F1A;
/* Shape */
--radius: 4px;
--radius-sm: 2px;
--radius-xl: 6px;
/* Depth */
--shadow: 0 0 20px rgba(0,255,136,0.15), 0 0 60px rgba(0,255,136,0.05);
--shadow-sm: 0 0 10px rgba(0,255,136,0.08);

Drop your email to rip the full DNA.

Tailwind, shadcn/ui & DESIGN.md are Pro exports. Get Pro β†’
Share This.
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You@youΒ·just now
Vibe coded my app in days. Designed it in seconds. Flip. Rip. Ship. seedflip.co/seed/phosphor
Fira Code
ABCDEFGHIJKLM
abcdefghijklm
0123456789 !@#
Body: Fira Code
✦ seedflip.co
#0C0C0C
#141414
#00FF88
Aa
radius: 4px Β· Neon glow
seedflip.co
3
12
47
1.2K
IG PREVIEW
Typography
Fira Code
Glow in the dark.
in Fira Code 13pt
600 / -0.01em
Colors
Accent
#00FF88
Surface
#141414
Text
#B3FFB3
Border
#1A2F1A
Shape & Atmosphere
Heading component
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed do eiusmod tempor.
Action button
Phosphor
Fira Code + Fira Code
seedflip.co
Typography
Fira Code
Glow in the dark.
in Fira Code 13pt
600 / -0.01em
Colors
Accent
#00FF88
Surface
#141414
Text
#B3FFB3
Border
#1A2F1A
Shape & Atmosphere
Heading component
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed do eiusmod tempor.
Action button
Phosphor
Fira Code + Fira Code
seedflip.co
Typography
Fira Code
Glow in the dark.
in Fira Code 13pt
600 / -0.01em
Colors
Accent
#00FF88
Surface
#141414
Text
#B3FFB3
Border
#1A2F1A
Shape & Atmosphere
Heading component
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed do eiusmod tempor.
Action button
Phosphor
Fira Code + Fira Code
seedflip.co
LINK
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KEEP READING
Shadow System Web Design→Dark Mode Color System→What Are Design Seeds→