"Jewel colours" refers to rich, vibrant, and deep colors that resemble the brilliance of gemstones like rubies, emeralds, and sapphires. Full definition
Except jewel colours tend to look best in lands flooded with sunshine. (idealhome.co.uk)
Its 93 rooms and suites, including the seven - bedroom Royal Suite, were reimagined by Pinto and grouped into five design schemes, reflecting the Regency period, with each consisting of three rich jewel colour ways to create warmth, harmony and comfort. (breakingtravelnews.com)
I have copious amounts of sand / beige in my closet and recently built up, or re-built I should say, my black basics so am inspired to combine them with a little touch of jewel colours I love. (amidprivilege.com)