Interactive Color Sandbox

Each control allows you to change 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.)

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

In both controls, each color component block 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 [nn] displays the intensity in hexadecimal.  Click the center button to select it, then type a new hexadecimal value on the button face, then click again to change the intensity to the new value.