"brilliant colors" is correct and can be used in written English.
You can use it to describe a scene with vivid colors. For example: The sunset sky was painted with brilliant colors of pink, purple, and orange.
B. speciosus differs from the two-colored bolete by having a fully reticulated stem, more brilliant colors, and very narrow cylindrical spores.
"Cupcakes in brilliant colors.
The captive algae give reefs their brilliant colors.
His paintings were characterized by brilliant colors and energetic movement.
Lines accented with brilliant colors have a playful character.
In New England, foliage and brilliant colors are very special".
Brilliant colors, mirrors and brass have become murky.
Mr. Schueller's recipe allowed for pleasant application, and more brilliant colors.
"And they ensure elasticity, softness and brilliant colors when the fibers are dyed".
The vegetables cook quickly, retain brilliant colors and a great deal of flavor.
Most women and men still wear longyis, or sarongs, many woven in brilliant colors.
