Hello Mike Shilkov,
The first request cannot be implemented easily. We have previously created a feature request regarding the ToolTips in RadSlider. You can vote for it here.
As for the colors you need, you can edit the template like so (the colors which are marked are additionally added):
You can find this realized in the attached template. Please let us know if it satisfies you.
Kind regards,
Petar Mladenov
the Telerik team
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