Every color name you can use with fill(), stroke(), and background(). Just put the name in quotes — like fill("tomato") — and you're good to go!
"#ff6600", or a number from 0 (black) to 255 (white) for shades of gray. But color names are the easiest way to get started!"red""darkred""crimson""firebrick""indianred""tomato""orangered""salmon""darksalmon""lightsalmon""lightcoral""pink""lightpink""hotpink""deeppink""mediumvioletred""palevioletred""mistyrose""orange""darkorange""coral""peachpuff""sandybrown""bisque""papayawhip""moccasin""navajowhite""linen""yellow""gold""lightyellow""lemonchiffon""lightgoldenrodyellow""khaki""darkkhaki""palegoldenrod""greenyellow""green""lime""limegreen""darkgreen""forestgreen""seagreen""mediumseagreen""springgreen""mediumspringgreen""lightgreen""palegreen""lawngreen""chartreuse""yellowgreen""olivedrab""olive""darkolivegreen""mediumaquamarine""darkseagreen""teal""cyan""aqua""aquamarine""darkcyan""lightcyan""paleturquoise""turquoise""mediumturquoise""darkturquoise""lightseagreen""cadetblue""blue""darkblue""navy""midnightblue""mediumblue""royalblue""steelblue""dodgerblue""deepskyblue""cornflowerblue""skyblue""lightskyblue""lightsteelblue""lightblue""powderblue""aliceblue""purple""indigo""darkviolet""darkorchid""blueviolet""mediumpurple""mediumorchid""orchid""violet""plum""magenta""darkmagenta""mediumslateblue""slateblue""darkslateblue""rebeccapurple""thistle""lavender""brown""maroon""saddlebrown""sienna""chocolate""peru""rosybrown""tan""burlywood""wheat""cornsilk""blanchedalmond""antiquewhite""white""snow""ivory""floralwhite""ghostwhite""honeydew""mintcream""azure""lavenderblush""seashell""oldlace""beige""whitesmoke""black""darkslategray""dimgray""slategray""gray""lightslategray""darkgray""silver""lightgray""gainsboro"