How to Convert Between HEX, RGB, and HSL Color Codes

How to Convert Between HEX, RGB, and HSL Color Codes

Colors in web development come in more flavors than a paint store. HEX, RGB, HSL — they all describe the same thing, but each format serves a different purpose. Knowing when to use which format, and how to convert between them, saves you from copying values into Google and hoping for the best.

HEX: the web native format

HEX codes like #2563eb are the most common color format on the web. Each pair of characters represents red, green, and blue values in hexadecimal. HEX is compact, universally supported, and easy to copy-paste. But it is terrible for making adjustments — if you want "the same blue but 20 percent lighter," you cannot do that math in your head.

RGB: the programmer format

RGB uses decimal numbers from 0 to 255 for each channel: rgb(37, 99, 235). CSS also supports rgba() with an alpha channel for transparency. The ToolStand Color Code Converter instantly translates between HEX and RGB — enter one, get the other.

HSL: the designer format

HSL stands for Hue, Saturation, Lightness. You pick a hue (0-360 degrees on the color wheel), adjust saturation (how vivid), and set lightness (black to white). HSL is intuitive for design work because it maps to how humans think about color. Want a lighter version? Increase lightness. Want a more muted version? Decrease saturation.

Building color schemes

Once you have a base color, the Color Palette Generator creates harmonious schemes using color theory: complementary, analogous, triadic, and monochromatic. Pick your base color in any format, and the generator produces a full palette with HEX codes ready to copy.

Practical workflow

You find a brand color in HEX: #7c3aed. You want a lighter variant for hover states. Step 1: Paste it into the Color Converter. Note the HSL values. Step 2: Increase Lightness for your hover variant. The converter shows the new HEX. Step 3: Open the Color Palette Generator for a complementary color. You have built a design system in under a minute.

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