Google Logo

 “Why Google used specific colours in their logo?” 

It might be that colors are assigned to letters according to whether their positions represent a prime number or don’t. Thus letters number 1, 2, 3 and 5 (all of them prime numbers) have a distinctive or “prime” color assigned: blue, red, yellow and green. Letters number 4 and 6 (not prime numbers) repeat colors -no longer “prime colors”- in the same order that such colors were assigned in the first time: blue and then red. If the sequence were to continue with new letters, the next letter, number 7, should have a new or “prime color” since 7 is prime; letters number 8, 9 and 10 should repeat colors in the pre established order: yellow, green and the same as 7′s; letter number 11, also a prime number, should have another new color, and so forth.