Questions with the keyword 'colour'

• Why are red, blue and yellow the primary colours? Also when I studied eyes it said the primary colours were red, blue by #nerdyweirdo to Chris, Josh, Rebecca, Rob, Susan Comments: (No comments so far )
• Why do different metals produce a different flame when burning? e.g why does copper have a green flame? by Zealousy to Rob Comments: (No comments so far )
• Why does the shy turn pink at dusk sometimes? by Gabriel_tekkers to Chris, Josh, Rebecca, Rob, Susan Comments: (No comments so far )
• Why do things become darker when they get wet? (e.g blonde hair) by Zealousy to Rebecca Comments: (No comments so far )