Red-Blue Gradient

import math
RedBlueList = ('ff0000','ff0048','ff008b','ff00b9','ff00e6','eb00ff','be00ff','9100ff','6400ff','2000ff')
def RedBlue(text):
    x = 10
    leng = len(text)
    output = ''
    if leng < x:
        for i in range(0, leng):
            output += '<c=#%s>' % RedBlueList[i]
        for i in range(0, leng):
            output += text[i] + '</c>'
    else:
        output += '<c=#'
        output += '><c=#'.join(RedBlueList)
        output += '>'
        size = int(math.ceil(leng / x+1))
        for i in range(1, x+1):
            output += text[(i-1)*size:i*size] + '</c>'
    return output
RedBlue.command="RedToBlue"