颜色理论：以编程方式玩转颜色

class color:
    def __init__(self, hex_code):
        self.hex = hex_code.lstrip('#')
        # past me: "this is probably all i need!"
    def to_rgb(self):
        # my first "aha!" moment with color spaces
        r = int(self.hex[0:2], 16)
        g = int(self.hex[2:4], 16)
        b = int(self.hex[4:6], 16)
        return f"rgb({r},{g},{b})"

def _rgb_to_hsl(self):
    # this was my "mind-blown" moment
    r, g, b = [x/255 for x in (self.rgb['r'], self.rgb['g'], self.rgb['b'])]
    cmax, cmin = max(r, g, b), min(r, g, b)
    delta = cmax - cmin
    # the math that made me question everything i knew about colors
    h = 0
    if delta != 0:
        if cmax == r:
            h = 60 * (((g - b) / delta) % 6)
        elif cmax == g:
            h = 60 * ((b - r) / delta + 2)
        else:
            h = 60 * ((r - g) / delta + 4)
    l = (cmax + cmin) / 2
    s = 0 if delta == 0 else delta / (1 - abs(2 * l - 1))
    return {
        'h': round(h),
        's': round(s * 100),
        'l': round(l * 100)
    }

def get_color_harmonies(self, color):
    """
    this is probably my favorite piece of code in the entire project.
    it's like playing with a color wheel, but in code!
    """
    h, s, l = color.hsl['h'], color.hsl['s'], color.hsl['l']
    return {
        'complementary': self._get_complementary(h, s, l),
        'analogous': self._get_analogous(h, s, l),
        'triadic': self._get_triadic(h, s, l),
        'split_complementary': self._get_split_complementary(h, s, l)
    }
def _get_analogous(self, h, s, l):
    # the magic numbers that make designers happy
    return [
        self._hsl_to_hex((h - 30) % 360, s, l),
        self._hsl_to_hex(h, s, l),
        self._hsl_to_hex((h + 30) % 360, s, l)
    ]

def simulate_color_blindness(self, color, type='protanopia'):
    """
    this feature wasn't in my original plan, but it became one of
    the most important parts of colorify rocks
    """
    matrices = {
        'protanopia': [
            [0.567, 0.433, 0],
            [0.558, 0.442, 0],
            [0, 0.242, 0.758]
        ],
        # added more types after learning about different forms of color blindness
        'deuteranopia': [
            [0.625, 0.375, 0],
            [0.7, 0.3, 0],
            [0, 0.3, 0.7]
        ]
    }
    # matrix multiplication that makes sure everyone can use our color palettes
    return self._apply_color_matrix(color, matrices[type])

def get_color_variations(self, color, steps=10):
    """
    This started as a simple feature request and turned into
    one of our most-used tools
    """
    return {
        'shades': self._generate_shades(color, steps),
        'tints': self._generate_tints(color, steps),
        'tones': self._generate_tones(color, steps)
    }