Mike, Guenni007, thanks a lot! I used the way with CSS. The names was changed in the translation module. RGB is working too.
.silver-bar .bar {
background: #E3A88D;
}
There are only presets and i cant add custom color. But i need to add the color which doesn’t exist in this list f.e. yellow, brown and violet. So my idea – to change colours of the few of presets colours.