Well, first of all you have to be willing to step back and realize that people that have sensory disabilities percieve the world differently than persons with intact senses. You need to step outside your normal way of thinking and be creative. A blind person is hypersensitive with sound, smell, touch, etc.
So you would need to use analogies, what each color would feel like or smell like.
White could be the feel of fluffy loose cotton.
Blue might be ice cubes for the chill of it.
Brown might be the smell of cinnamon.
Red could be something heated very warm.
Green could be the smell of freshly mowed grass.
Yellow could be the taste of creamy butter.
A blind person probably never will see, but they can experience broader ranges of mental concepts if they are assisted to do so.
