SmallBASIC uses the standard colors 1 to 15, which might be quite limiting. To define your own colors the functions RGB und RGBF can be used. A nice source of predefined colors are the standard CSS colors used for website creation. A list of the colors and there names can be found here. To make it easier to deal with the color names SmallBASIC provides a unit.
The unit can be downloaded or copy pasted from the SmallBASIC Github website. Please save the unit in the same directory as your basic file. The file crgb_test.bas can be used to display all colors and there names.
Import crgb as c
Color c.Black, c.Lime
Cls
Color c.Black, c.Tomato
Print " Standard CSS Tomato background color "
Color c.Black, c.LightSteelBlue
Print " Standard CSS LightSteelBlue background color "
rect 200, 200, 400, 400 COLOR c.DeepPink filled