if the dice have red spots, yours should not be (since most dice have black spots), but you could have blue spots, for example.
its a DICE ffs, go to any game shop that deals in role playing and you can buy uv clear large tiny multicoloured etc, im pretty sure ive seen a solved rubix cube that is also a dice
the colour choice of the original game dice should not hinder anyone elses
its not like anyone OWNS the patent etc of dice, not since they are 'king ages old
if for example it was pass the pigs you could argue that it is going to be hard NOT to copy the pig/dice
or if they made a novelty dice edition for adults which had 'rude' bits on each side then using said rude bits would be a no no
playing cards have a copyright notice on them, not for the cards in general but for the image on the back and the ace of spades (the only non face card to get an image) and the royal cards and jokers
there is nothing to stop you having a 2 3 4 5 6 7 8 9 10 j q k
its not as if waddingtons are going to say hang on you cant have a j q k in your deck we own that idea have something else
but if you use THEIR j q k image then you are in the ****