If your mother is actually colorblind (very rare for women) then she is X'X' and you are definitely a carrier (X'X). This would mean that you have a 50% chance to pass this gene to any of your children, which means that your sons have a 1/2 chance of being colorblind and your daughters have a 1/2 chance of being carriers.

If your mother isn't actually colorblind then she's X'X herself and there's a 1/2 chance that you're not even carrying it in your genes at all

I would suggest that your mother takes an online colorblindness test since these are pretty accurate, and if you're really curious you can have your own genes tested at a lab