The definition of impromptu is something done without advance thought or without a plan. When everyone gets together and decides to throw a party at the spur of the moment, this is an example of animpromptu party. impromptu. an impromptu speech, performance, etc. impromptu.
If you prefer lighter color combinations, then instead of these three, go in for pink, light blue and pale yellow color combinations. Contrasting Color Combinations. By bringing together colors in different color categories, many interesting color combinations can be made.
Analogous colors are next to each other on the color wheel and mix together easily. Some examples of analogous colors are yellow-orange, orange-red, yellow-orange-red, violet-red, blue-green, and blue-violet. Analogous colors can be bright or muted, but they lie next to each other on the color wheel.