Hard textures are more difficult to press, break or bend, such as rock or stone, some metals and woods. Soft textures are easily compressible, breakable, or bend more easily such as wool, fibrefill, gummy.
‘Hard / Hardness’ and colour in Germany
Cold blue, a detached, indifferent colour
Colour weight on the lightness axis
Heavy, lightweight and their correlations
Heavy, tight and hard
Proverbs and sayings: open-closed