Colour!

colourful...vibrant...striking...hues...primary/primaries... secondary/secondaries...tertiary/tertiaries...clashing... harmonious...combination...colour-scheme...hints... pastels...shades...tones...bright...strong...dull...weak... warm...cool...hot...cold...seasonal...spring/spring-like... summer/summery...autumn/autumnal...winter/wintery... earth/earthy...air/airy...fire/fiery...water/watery... natural...unnatural...manmade...subtle...gentle...soft... quiet...garish...loud...