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.
The classic color wheel shows hues arranged in a circle, connected by lines or shapes. The colors include primary colors (red, yellow, and blue), secondary colors (orange, green, and violet), and tertiary colors (yellow green, blue green, blue violet, red violet, red orange, and yellow orange).