The rainbow

* Offer runs from 14 July–1 September, subject ...

All about the CIE XYZ space, which is the reference standard for colour transformations

Tom Morris of Morrisstudio is known for his love of rich, earthy tones, so we posed him the colour questions you ask us most

Sci-fi and fantasy heroes have a habit of bumping into famous people from the past... How many can you remember?

YOU could be in with a chance of winning £200

Mythical creatures, mountains, UK railway stations and ready meals are all dished up in this month’s batch of tricky teasers