1.
lacking in variety and interest
a colourless and unimaginative person
a colourless description of the parade
2.
weak in color; not colorful
The following are synonyms for 'colourless'. Click on any of them to get both Bibliodata's full list of common definitions and a further set of synonyms.
Even though a polar bears fur looks white it is actually colourless and is made with hollow tubes. The reason the bear looks white is because the rough inner surface of the tubes make light scatter and reflect at many different angles which gives the white appearance.
