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LauverSystems.com

Interactive Color Sandbox

Use these background and foreground controls to test color combinations.

 
Each control changes the intensity of the red, green, and blue (RGB) components which make one color for the background or the foreground text on this page.  From dark to bright, the intensities are expressed in the decimal range 0-255, or the equivalent hexadecimal range 00-FF.

Unlike decimal (base10), hexadecimal (base16) counts 0-9, then A-F (decimal 10-15), in each position; so hexadecimal FF equals decimal 16*2-1 or 255.  (Likewise, decimal 99 = 10*2-1.)

Because each component can vary among 256 intensities, all 3 combined (FFFFFF, or 256*3-1) provide 16,777,215 colors.  Viewing them accurately depends on your eyes, browser, monitor, and printer.  Use this page to see what works, then record the color codes for use in other applications.

Each red, green, and blue control displays its color and name, its intensity in decimal, and 3 buttons.  The left button [<] darkens by 1 unit.  The right button [>] brightens by 1 unit.  The center button [xx] displays the intensity in hexadecimal: click to select it, then type a new value on the button face, then click again to change the intensity to the new value.
 
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Resources

W3Schools HTML Colors by Code
W3Schools HTML Colors by Name



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