Color & CSS Tools
14 toolsWriting CSS for colors, gradients, and shadows by hand often means guessing values, refreshing the browser, and repeating the cycle until it looks right. These visual tools eliminate that trial-and-error loop entirely. Convert colors between HEX, RGB, and HSL formats to ensure consistency across your design system; generate linear and radial CSS gradients with interactive color stops and angle controls; build box shadows with adjustable offset, blur, spread, and opacity — all with an instant live preview that shows exactly how each property looks before you write a single line of CSS. The color palette generator creates harmonious color schemes (complementary, analogous, triadic) from any base color, giving you a complete palette with ready-to-use HEX, RGB, and HSL values for design tokens. The aspect ratio calculator helps you maintain proportional dimensions for responsive images, videos, and UI elements across breakpoints. Every tool outputs clean, copy-ready CSS code compatible with all modern browsers — no vendor prefixes required. Whether you are building a design system from scratch, fine-tuning a landing page, or exploring color options for a client project, these tools make the visual design process faster and more precise.
Color Converter
Convert colors between HEX, RGB, and HSL formats online. Enter any color value and instantly get the equivalent in all three formats with a live color preview.
CSS Gradient Generator
Create linear and radial CSS gradients visually with a live preview. Adjust colors, angle, and stops — copy the ready-to-use CSS gradient code instantly.
Box Shadow Generator
Generate CSS box-shadow code with interactive sliders. Adjust offset, blur, spread, color, and opacity visually with a live preview — copy CSS instantly.
Color Palette Generator
Generate harmonious color palettes from any base color. Get complementary, analogous, and triadic color schemes with HEX, RGB, and HSL values — free tool.
Aspect Ratio Calculator
Calculate aspect ratios and find missing dimensions for images, videos, and UI elements. Free online aspect ratio calculator with instant results.
Tailwind CSS Converter
Convert CSS to Tailwind utility classes and Tailwind classes back to CSS online. Bidirectional converter with live preview — supports Tailwind v3+ arbitrary values, free, no signup.
CSS Units Converter
Convert CSS units instantly: px to rem, rem to em, px to vw/vh, pt, and percent. Set custom base font size and viewport dimensions for accurate results.
CSS Grid Generator
Free online CSS Grid generator with live visual preview. Set columns, rows, gaps, and alignment — get clean, copy-ready CSS and HTML instantly.
CSS Clip-Path Generator
Create CSS clip-path shapes visually with live preview. Supports polygon, circle, ellipse, and inset — with 10 preset shapes including star, arrow, hexagon, and cross. Free online clip-path builder.
Text Shadow Generator
Design CSS text-shadow effects visually with multiple layers, live preview, and real-time controls. Adjust offset, blur, color, and opacity for each shadow layer — free online text shadow builder.
CSS Animation Generator
Build CSS keyframe animations visually with 12 presets and a custom keyframe editor. Supports timing functions, iteration, direction, fill mode — with live preview and replay. Free online animation builder.
Border Radius Generator
Design CSS border-radius values visually with live preview. Supports simple, advanced (individual corners), and blob mode for organic shapes. Includes 8 blob presets and randomize. Free online border radius tool.
Common Use Cases
Convert brand colors between HEX, RGB, and HSL for design system documentation
Generate accessible color palettes for dark mode and light mode themes
Create CSS gradients for hero sections, buttons, and card backgrounds visually
Build consistent box shadow scales (sm, md, lg, xl) for elevation design tokens
Calculate responsive image dimensions that maintain correct aspect ratios
Prototype CSS animations with custom timing functions and keyframe previews
Generate clip-path shapes for creative section dividers and image masks
Frequently Asked Questions
Do the generated CSS values work in all modern browsers?
Yes. All generated CSS uses standard syntax supported by Chrome, Firefox, Safari, and Edge. No vendor prefixes are needed for the properties used by these tools in current browser versions.
Can I use these tools for design work outside of CSS?
Yes. The color converter and palette generator output HEX, RGB, and HSL values that work in any design tool including Figma, Sketch, and Adobe Creative Suite. The visual interfaces are useful for exploring color and layout options regardless of your output format.
How do I ensure my color choices meet accessibility standards?
Use the color converter to obtain RGB values, then calculate the WCAG contrast ratio between your text and background colors. WCAG 2.1 requires a minimum 4.5:1 ratio for normal text and 3:1 for large text. Avoid relying solely on color to convey information.
What is the difference between HEX, RGB, and HSL color formats?
HEX (#FF5733) is a compact hexadecimal notation widely used in web development and design handoff. RGB (rgb(255, 87, 51)) defines color by red, green, and blue channel values from 0 to 255 — it maps directly to how screens display color. HSL (hsl(11, 100%, 60%)) defines color by hue (color wheel degree), saturation (vibrancy), and lightness (brightness) — it is the most intuitive for humans to adjust because you can shift the hue without affecting brightness, or desaturate without changing the color itself. Use HEX for concise CSS code, RGB for programmatic color manipulation, and HSL when you need to create tints, shades, or harmonious variations of a color.
How do I create a consistent design system with these tools?
Start by choosing a primary brand color and use the Color Palette Generator to create a harmonious palette with complementary, analogous, or triadic colors. Then use the Color Converter to define each color in HEX, RGB, and HSL formats for your CSS custom properties (design tokens). For elevation and depth, use the Box Shadow Generator to create a consistent shadow scale (sm, md, lg, xl). Finally, define your gradient system with the Gradient Generator. Export all values as CSS custom properties for a single source of truth across your project.
Why do gradients sometimes look muddy or gray in the middle?
This happens because CSS gradients interpolate colors in the sRGB color space by default, which is not perceptually uniform. A red-to-blue gradient passes through a grayish midtone in sRGB but produces a vibrant purple in perceptually uniform color spaces. Modern CSS supports color space specification: linear-gradient(in oklch, red, blue) produces much more vibrant results. Chrome 111+ and Safari 16.2+ support this syntax. Use these tools to define your base colors, then specify the interpolation color space in your CSS for optimal results.
What common aspect ratios should I know for web and mobile?
16:9 is the standard for HD/4K video, desktop monitors, and YouTube thumbnails. 4:3 is the classic format still used in some tablets and presentations. 1:1 (square) is used for social media profile pictures and Instagram posts. 9:16 (portrait) is the standard for mobile-first video content like Instagram Reels, TikTok, and YouTube Shorts. 1.91:1 (1200×628) is the recommended Open Graph image ratio for optimal display on Facebook and LinkedIn link previews. The Aspect Ratio Calculator helps you compute missing dimensions for any ratio.
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