# Colour filter

Also called: color filter, planetary filter, Wratten.

A tinted filter (light blue, orange, red…) that raises the contrast of particular features on planets.

Planet details have colour: Jupiter's red-brown belts stand out through a light blue (#80A) filter; Mars's dark markings through orange or red (#21, #23A); Venus's glare drops with a violet or dark blue one. The effect is subtle but real, especially in larger telescopes.

**Related:** [Planet](https://astropilot.space/glossary/planet.md), [Great Red Spot](https://astropilot.space/glossary/great-red-spot.md), [Moon filter](https://astropilot.space/glossary/moon-filter.md)

From the AstroPilot astronomy glossary: https://astropilot.space/glossary/color-filter