Macro Command Reference
legendcolor <c> <c> <c> [a]
legendcolor <COLOR>
colormode
(0=RGB, 1=HSB). With a the alpha value can be defined (default is 1.0). Alternative you can specify the color as hexadecimal string.
COLOR
This can be a hexadecimal color definition in the format RGB, ARGB, RRGGBB or AARRGGBB where R is red, G is green, B is blue and A is alpha.
There are also named colors which can be used: black, white, red, green, blue, orange, yellow, magenta, cyan, aluminum, aqua, asparagus, banana, blueberry, bubblegum, cantaloupe, carnation, cayenne, clover, eggplant, fern, flora, grape, honeydew, ice, iron, lavender, lead, lemon, licorice, lime, magnesium, maraschino, maroon, mercury, midnight, mocha, moss, nickel, ocean, orchid, plum, salmon, seafoam, silver, sky, snow, spindrift, spring, steel, strawberry, tangerine, teal, tin, tungsten, turquoise
The Plot default colors can be addressed with the numbers 0-15