Misusage of adaptive colors in sliders when color is overriden

[RenaudDenis]

Regression: The color prop on Slider components does not affect the foreground (value) strip style anymore and the theme color is always applied.

Note: Is not specific to the playground app (occurs in the online doc too).

Expected behavior:

• the color prop takes precedence over the theme color
• it affects the foreground strip whatever the variant
• the background style is correct (dimmed color for the background for "abtract" and gray for other variants)