Early Quenya
qile
noun. hue, colour
qilya-
verb. to adorn, embellish, colour
There are more words but they are from Tolkien's earlier conceptional periods. Tolkien likely changed these words as he evolved the aesthetics and completeness of the languages. You may even find languages that Tolkien later rejected. Do not mix words from different time periods unless you are familiar with the phonetic developments.
Below: Tolkien's Late Period (1950–1973). These are from Tolkien's late conceptual period — his most settled forms of the languages. Prefer these over the earlier ones above when composing new text.
A word appearing as ᴱQ. qilya- “adorn, embellish, colour” in the Qenya Lexicon of the 1910s under the early root ᴱ√QILI (QL/77).
Neo-Quenya: I would retain ᴺQ. quilya- in the senses “to colour, embellish” for purposes of Neo-Quenya, but for “adorn” I would use the later verb netya- (VT47/33). In the “Neologism of the Day” (NotD) series on the Vinyë Lambengolmor Discord Server on 2023-04-30, Luinyelle suggested ᴺQ. quilya- might also be used as the verb for “✱to paint”.