boards/abstracts/tripcode.py

class Tripcode:
    def __init__(self, code_str):
        self.tripcode = code_str

    def get_color(self):
        return self.tripcode[:6]

    def get_background(self):
        code = self.get_color()
        result = ''

        for i in range(0, len(code), 2):
            p = code[i:i+2]
            background = hex(255 - int(p, 16))[2:]
            if len(background) < 2:
                background = '0' + background
            result += background

        return result

    def get_short_text(self):
        return self.tripcode[:8]

    def get_view(self):
        return '<span style="color: #{}; background: #{}">{}</span>'\
            .format(self.get_color(), self.get_background(),
                    self.get_short_text())