watercoloured
/ˈwɔːtəˌkʌləd/(US watercolored)
adjective
1Painted or executed in watercolours. Also figurative : pale, insipid.
2Usually hyphenated. Of the colour of water; blue, greyish-blue.
Origin
Mid 17th century; earliest use found in Edward Phillips (b. 1630), writer and biographer. Partly from watercolour + -ed.