Support colors

Scheme:default

schemes.add('custom', ['#F00', '#FF0', '#0F0', '#0FF', '#00F', '#F0F'])

rotateLinear = createRotateLinear('#ff7f7f');
schemes.add('rotate', createColors(rotateLinear, 12, false));

colors base color. colors2 sub color.(converted color) linear linear gradient to base color from alpha 0.