Character for dice in Cantonese
骰 http://www.cantonese.sheik.co.uk/dictionary/characters/3676/
  
  dice
  
  jyuping: /sik1/ ; /tau4 /
  
  Pinyin: /tou2 /
  
  Jyutping tau4 is literary reading ; sik1 is colloquial. The latter one is much more common in usage.


As you can see, 骰 in Mandarin has only one reading (tou2)

In Cantonese,  the literary (tou2) and colloquial reading (sik1) of 骰 are different.

色(color) and 骰(dice) are just homographs that share the same reading /sik1/

I have never heard any Cantonese read 骰 as /tau4/ in my life.