Yes. Definately some overlap. Just as you stated, the number 3. It's similar color as letter E. A Purple-maroon shade. Also S and 5 are somewhat similar. Both

Yes. Definately some overlap. Just as you stated, the number 3. It's similar color as letter E. A Purple-maroon shade. Also S and 5 are somewhat similar. Both are blue-ish. No overlap on number 6. Its always light blue. Same for 7, its always green. Finally 8 and H are both brown and oddly exact same color. Not sure if its because H is also the 8th letter in the alphabet.