Serendipity: Indeed, the colours are: white, gray, brown, blue, black, red, yellow and pink. My preference would be to replace gray with green (or perhaps orange), as I sometimes find it hard to distinguish between gray and white. But who knows, perhaps one day we'll see 'Giant Logic' with green, light-blue, orange, purple, beige, maroon and violet as additionally colours.
Having said that, perhaps we could have alternative game pieces for Logic; for instance balls with numbers or letters (in contrasting colours, black letters on white balls for instance). We have game piece options for other games as well.
AbigailII: hard to distinguish between gray and white ? Yes, terribly hard, it makes the game almost unplayable. My vote for numbers tips like in Mancala