Full Idea
If I am right, colours, tastes, odours and sounds are not, for Locke secondary qualities but ideas; secondary qualities are colourless, tasteless, odourless and soundless textures of bodies.
Gist of Idea
Colours, smells and tastes are ideas; the secondary qualities have no colour, smell or taste
Source
report of John Locke (Essay Conc Human Understanding (2nd Ed) [1694]) by Peter Alexander - Ideas, Qualities and Corpuscles 8
Book Reference
Alexander,Peter: 'Ideas, Qualities and Corpuscles' [CUP 1985], p.173
A Reaction
This the concise summary of Alexander's reading of Locke, and I find him wholly convincing.