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.
   For pigments, where colors a â¦ re mixed together, Red, Yellow and Blue.   The three primary colors are Red, Blue, and Yellow. From these colors, one can make the others by mixing them together. Red and blue make purple, red and yellow make orange, blue and yellow make green, ect.