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.
Multiple shades of red and even pink or orange can combine for a cheerful palette. Red pairs well with other colors: Although not normally considered an ideal coupling, in combination with green, red is a Christmas color, a staple of the joyful season. Cool blues provide contrast and tone down the heat of red.