Fix: nearly invisible traces with spatial_colors=True (#13286)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: Mojackhak

doc/changes/devel/13286.bugfix.rst

@@ -0,0 +1,3 @@
+Fixed almost-white (barely visible) channel traces when using
+``spatial_colors=True`` in :meth:`mne.io.Raw.plot_psd`,
+:meth:`mne.Epochs.plot_psd`, and related PSD-plot helpers, by :newcontrib:`Mojackhak`.

doc/changes/names.inc

@@ -206,6 +206,7 @@
 .. _Milan Rybář: https://milanrybar.cz
 .. _Mingjian He: https://github.com/mh105
 .. _Mohammad Daneshzand: https://github.com/mdaneshzand
+.. _Mojackhak: https://github.com/Mojackhak
 .. _Moritz Gerster: https://github.com/moritz-gerster
 .. _Motofumi Fushimi: https://github.com/motofumi-fushimi/motofumi-fushimi.github.io
 .. _Nabil Alibou: https://github.com/nabilalibou

mne/viz/evoked.py

@@ -226,6 +226,8 @@ def _rgb(x, y, z):
     rgb = np.array([x, y, z]).T
     rgb -= np.nanmin(rgb, 0)
     rgb /= np.maximum(np.nanmax(rgb, 0), 1e-16)  # avoid div by zero
+    # Reduce RGB intensity for overly light colors
+    rgb[rgb.sum(axis=1) > 2.5] = rgb[rgb.sum(axis=1) > 2.5] - 0.3
     return rgb
 
 

tutorials/evoked/20_visualize_evoked.py

@@ -16,7 +16,7 @@
 # Copyright the MNE-Python contributors.
 
 # %%
-
+# test
 import numpy as np
 
 import mne