An ink that changes colour when exposed to light, like an octopus does to match its surroundings, could one day be used for automatic camouflage. Most colour-changing inks and materials use ...

When white light passes through a coloured filter, all colours are absorbed except for the colour of the filter. For example, an orange filter transmits orange light but absorbs all the other colours.

Meta's WhatsApp is releasing a new feature to bring a light and dark main theme colour to the business app and its accessible for some beta testers. It is worth noting that the new feature has ...

The two new additions are the Active Light Cool to Warm White and the Active Light Colour Changing Bulb, which will fit both the B22 and E27 light sockets you might have in your home. The Cool to ...

The amber light used on modern traffic lights was not introduced until 1921 when inventor William Potts brought the three-colour traffic light to Detroit. This innovation added a yellow “caution ...