ref: 3cb919f4f7eb8a0785ace3c750a4a33987a6eb49
parent: cdd24fd459d15b8a00498b284d00c202cf872022
author: Ben Harris <bjh21@bjh21.me.uk>
date: Thu Dec 29 17:28:03 EST 2022
Tracks: Set the grid colour based on others COL_GRID used to be mid-way between the usual COL_BACKGROUND and COL_TRACK_BACKGROUND. But then I changed mkhighlight() so that it didn't make COL_BACKGROUND so dark and that made the grid lines indistinguishable from the track background. Now COL_GRID is generated from COL_BACKGROUND and COL_TRACK_BACKGROUND so as long as those are sufficiently distinct from each other, COL_GRID will be distinct from both of them.