I can’t just choose colours. I can only choose between preset colour schemes. To elaborate, I cannot change individual colours, just pick a scheme which recolours the entire box.
If bright orange is too dark, I have limited options as that’s middle brightness. I’ve tried blue (same brightness level but different hue). Is that better? Personally I think it clashes.
Actually, I’ve set eight of the right column boxes to different bright colours to show the options. From top to bottom they are Blue, Lime, Crimson, Pink, Teak, Purple, Violet, Green & Purple. Ones I haven’t used yet are: Yellow, Transparent, Red and all the dark colours (brown, charcoal etc.).