Label color in model explanation

**What's wrong?**

Look at the picture. The legend is from blue to ted. Where those yellows, oranges ang greens come from?

**How can we reproduce the problem?**

**What's your environment?**

- Operating system: Windows 10
- Orange version: 3.32
- How you installed Orange: Standalone for windows

Start by reproducing the reported model-explanation legend in Orange 3.32 on Windows 10 and compare the screenshot's blue-to-red scale with the yellow, orange, and green labels. Done means identifying why those colors appear and documenting or correcting the legend behavior, with confirmation from the same workflow.

Written by the indexing model from the issue text.