Fix colours so they work on dark mode.
Fix colours so they work on dark mode.

suldae/roll20-character-sheets,Roll20/roll20-character-sheets,finderski/roll20-character-sheets,vince-roll20/roll20-character-sheets,kreuvf/roll20-character-sheets,finderski/roll20-character-sheets,vince-roll20/roll20-character-sheets,Roll20/roll20-character-sheets,kreuvf/roll20-character-sheets,vince-roll20/roll20-character-sheets,vince-roll20/roll20-character-sheets,finderski/roll20-character-sheets,kreuvf/roll20-character-sheets,finderski/roll20-character-sheets,suldae/roll20-character-sheets,vince-roll20/roll20-character-sheets,suldae/roll20-character-sheets,finderski/roll20-character-sheets,Roll20/roll20-character-sheets,kreuvf/roll20-character-sheets,suldae/roll20-character-sheets,Roll20/roll20-character-sheets,suldae/roll20-character-sheets,kreuvf/roll20-character-sheets,Roll20/roll20-character-sheets