Krux color generator

krux_colors_generator.py

"""
Create Krux colors from 8 bits RGB values
Type r g b arguments as 0-255 numbers
"""

import sys

def rgb888torgb565(color):
    """convert to gggbbbbbrrrrrggg to tuple"""
    MASK5 = 0b11111
    MASK3 = 0b111
    red, green, blue = color
    red *= 31
    red //= 255
    red = red << 3
    
    green *= 63
    green //= 255
    green_a = green & 0b111
    green_b = green & 0b111000
    green_b = green_b << 10
    green = green_a + green_b
    blue *= 31
    blue //=255
    blue = blue << 8
    return format(red+green+blue,'04x')

if len(sys.argv) == 4:
    try:
        red = int(sys.argv[1])
        green = int(sys.argv[2])
        blue = int(sys.argv[3])
        print(rgb888torgb565((red,green,blue)))
    except:
        print("Type r g b arguments as 0-255 numbers")
else:
    print("Type r g b arguments as 0-255 numbers")