Feedback: In the skill tree the line colors for the weapon set nodes are difficult to distinguish

The color of the lines in the skill tree blends together and are difficult to distinguish:
Colors between nodes:
1. Two selected nodes - white-ish
2. Selected and not selected node - dark orange with faint orange inside
3. Weapon Set 1 nodes - dark orange?
4. Weapon Set 2 nodes - dark green

The 2. is completely useless: The idea that you can select only nodes that are next to nodes that you already selected is the most natural thing in the world and you don't need special color for these lines. And these 'yet another orange-red' lines just make reading my skill tree more difficult.

The colors for 1, 3 are very close.
The green for 4 is kind of noticeable, but still not contrasted enough.

I just want to be able to distinguish between W1, W2 and the other selected nodes at glance.

+1
The turned-off colors and the Unlockable-node are a little hard to distinguish