Color Picker and Format Converter: HEX, RGB, HSL in One Tool

Design handoff is one of the more tedious parts of frontend development. A designer sends you a Figma comp with colors in HSL, your CSS uses HEX, and the color library you're using wants RGB tuples. Instead of doing the math or hunting for a conversion formula, the CalcHub Color Picker converts between all major color formats instantly while letting you explore the color space visually.

What the Tool Does

You get a full visual color picker — the kind with a gradient square for saturation and lightness, a hue slider, and an opacity slider. Alongside it, live-updating fields show the current color in every common format simultaneously:

• HEX — the #RRGGBB format used everywhere in CSS and HTML
• RGB — rgb(255, 99, 71) — the raw red, green, blue channel values
• HSL — hsl(9, 100%, 64%) — hue (0–360°), saturation, lightness; much more intuitive for color adjustments
• HSV/HSB — used by design tools like Photoshop and Figma

Edit any field and all the others update in real time. Type in a HEX code from a design spec, and immediately see the HSL values for when you need to create lighter and darker variants.

How to Use It

Visual selection: Click anywhere in the color gradient to pick a color, drag the hue slider to change the base hue, and use the opacity/alpha slider if you need a transparent version. Direct input: If you already have a color value, just type it into the relevant field:

• Type #FF6347 to load Tomato red
• Type rgb(255, 99, 71) in the RGB field
• Type hsl(9, 100%, 64%) in the HSL field

Copy: Click the copy button next to any format to copy just that value — ready to paste into your CSS.

Format Reference

Format	Example	When to use
HEX	#FF6347	CSS, HTML, most web contexts
HEX with alpha	#FF634780	CSS with transparency
RGB	rgb(255, 99, 71)	CSS, Canvas API, image processing
RGBA	rgba(255, 99, 71, 0.5)	CSS with transparency
HSL	hsl(9, 100%, 64%)	CSS, making color variants
HSLA	hsla(9, 100%, 64%, 0.5)	CSS with transparency
HSV	hsv(9, 72%, 100%)	Photoshop, Figma, design tools

Why HSL Is Underrated for CSS

Most developers default to HEX because that's what design tools export, but HSL is actually more useful when you're building a color system in CSS. Consider these Tailwind-style variants:

/ Hard to reason about the relationship between these HEX values /
--blue-400: #60a5fa;
--blue-500: #3b82f6;
--blue-600: #2563eb;

/ The relationship is obvious with HSL — just the lightness changes /
--blue-400: hsl(213, 94%, 68%);
--blue-500: hsl(217, 91%, 60%);
--blue-600: hsl(221, 83%, 53%);

When you need to create a hover state that's slightly darker, or a disabled state that's lighter, HSL makes it a one-number change. Use the converter to get the HSL equivalents of your brand colors.

Practical Use Cases

Matching a brand color from a logo. Someone sends you a hex code from their style guide: #1DA1F2 (Twitter blue). Open the picker, paste the hex, and grab the HSL value so you can build lighter/darker variants for hover states and backgrounds. CSS custom properties system. When building a design token system, convert all your brand colors to HSL so you can programmatically generate the full color scale. Accessibility checking. The RGB values feed directly into contrast ratio calculations. If you're checking whether your text passes WCAG contrast requirements, you need the raw values. Code samples and documentation. Color pickers in browser devtools show HEX; some show RGB. If a team member sends a value in one format and you need another, this is the fastest conversion path.

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What's the difference between HSL and HSV?

Both use Hue (0–360°) and Saturation, but the third channel is different. HSL uses Lightness, where 50% is the full saturated color, 0% is black, and 100% is white. HSV uses Value (also called Brightness), where 100% is the full saturated color and 0% is black. Pure white in HSL is hsl(, , 100%). In HSV, pure white is hsv(*, 0%, 100%). Design tools like Photoshop and Figma use HSV; CSS uses HSL.

Why does my hex color look different in print vs. screen?

Monitors use RGB (additive color — mixing light). Print uses CMYK (subtractive color — mixing ink). The same HEX value will always look different in print. If you're designing for print, work with CMYK values and use a proper color profile. The converter here is for screen/web use.

Can I input a CSS color name like "tomato" or "rebeccapurple"?

The picker accepts HEX, RGB, and HSL input. CSS named colors aren't directly supported as input — but you can look up the hex equivalent (tomato = #FF6347, rebeccapurple = #663399) and paste that in.

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Related Tools on CalcHub

• Regex Tester — write patterns to extract hex color codes from CSS files
• JSON Formatter — format design token files that contain color values
• Password Generator — unrelated but handy while you're here