About TrueCSSApp
TrueCSSApp is a free, browser-based CSS gradient generator built for designers and developers who care about shipping real, accessible UI — not just gradients that look good in isolation.
Every gradient you build is tested against WCAG contrast standards in real time, previewed through four types of colour vision deficiency, and exported in the format your codebase actually uses.
What It Does
Gradient Generator
Build linear, radial, and conic gradients with full control over stops, angles, easing, and interpolation. The output updates live as you drag — no preview lag, no page refresh.
WCAG Contrast Checker
Every colour stop is automatically checked against white and black backgrounds and rated AA, AAA, or Fail per WCAG 2.1. The result updates as you change colours — accessibility is part of the design process, not a final audit step.
Text on Gradient Preview
See real heading, body, and caption text rendered directly over your gradient at three sample points — left, centre, and right. Each position shows a live contrast ratio and pass/fail rating.
Color Vision Simulation
Preview your gradient as seen by users with protanopia, deuteranopia, tritanopia, or achromatopsia. Switch to compare mode to see the original and simulated versions side by side.
Design Token Export
Name your gradient and set a token prefix, and the token panel generates a live :root block with your gradient as a CSS custom property.
Multi-Format Export
Copy your gradient as raw CSS, Tailwind v4 utility classes, SVG, Canvas API code, or CSS variables. The Tailwind export detects when your gradient exceeds what utility classes can express and generates the correct configuration instead of broken output.
Who It Is For
Frontend developers who build accessible interfaces and need a gradient tool that speaks the same language as their codebase.
UI and product designers who work in code or hand off to developers, and need gradients tested against real contrast requirements before they leave the design stage.
Design system teams who need consistent, named gradient tokens that slot directly into an existing CSS variable system.
Accessibility practitioners who audit interfaces for colour vision deficiency compliance and need a tool that simulates all four major deficiency types against real gradient content.
Why We Built It
Most gradient generators produce a CSS string and stop there. TrueCSSApp closes the gap between “generating a gradient” and “shipping a gradient.” Everything you need to make the right decision — contrast ratios, vision simulation, token naming, format-specific export — is in the same place as the gradient itself, updating live as you work.
Gradient Library
TrueCSSApp includes a searchable library of gradient combinations across ten categories — blue, purple, pink, sunset, gaming, SaaS, pastel, neon, dark, and green — each with copy-ready CSS, Tailwind classes, and a WCAG contrast rating.
Color Resources
Color Palettes — curated colour sets organised by category, each with hex values, copy buttons, and a direct link to build a gradient from the palette in the generator.
Color Shades — complete shade ranges for each major hue, from darkest to lightest, with hex, RGB, and HSL values and one-click copy for each.
Privacy
TrueCSSApp runs entirely in your browser. The colours, gradients, token names, and settings you work with are never transmitted to a server. Closing or refreshing the page clears everything — nothing is stored between sessions.
Analytics are collected via Cloudflare Zaraz with explicit consent. No data is collected without your permission.
Free, No Account Required
TrueCSSApp is free to use with no account, no sign-in, and no paywall. Open the tool, build a gradient, and copy the code.