That looks like it would be ok! It just has to have "one chroma" right? So like. Only ever use colors with the same hue value in HSV or HSL and you're good 👍
(for my game, I chose a purple hue, so I used black, white, dark purple, full saturation purple, lavender, and partially transparent blends of those colors. But i don't work here so idk for sure if I got it right lol)