what colour / temperature bulb for spotlight on wall art?

[BruceAndNosh]

If it makes a difference, the picture is a mostly blue seascape

Thanks

Have you got a picture light over your picture? https://www.universal-lighting.co.uk/products/twin-arm-switched-satin-brass-picture-light-49cm/

if so, I'd recommend getting hold of some warm white and cool white/daylight bulbs and swap them out to see the difference. And there will be a difference depending on the tones involved.
Warm white is always more popular, but, if your picture is mostly blue and bright then the cool white/daylight bulbs will definitely bring out the colours.

Thanks for your reply.
Unfortunately we already have a ceiling mounted directional spotlight which is old school halogen, which has yellowed with age. I am about to swap it for a new LED one with a narrow beam bulb.
I've bitten the bullet since originally posting and gone for a 3000k warm white and I'll report back...