Describe the bug

It's not possible to use a different color for the toggle button of the selected node, because there is no design token and the color is explicitly set to "inherit". There are design tokens for several other states (including selectedHoverColor), so there should also be a design token for selectedColor.

Pull Request Link

#17684

Reason for not contributing a PR

• Lack of time
• Unsure how to implement the fix/feature
• Difficulty understanding the codebase
• Other

Other Reason

No response

Reproducer

https://primeng.org/tree#multiple

Environment

Angular version

19.1

PrimeNG version

v19

Node version

No response

Browser(s)

No response

Steps to reproduce the behavior

• open the example on https://primeng.org/tree#multiple
• select a node and inspect the DOM
• color is set to "inherit" and not using a CSS variable

Expected behavior

There should be a design token for the selected color of the node toggle button.