Takes a list of RGB colors as hex strings and applies the first color's hue as a tint to every other color while preserving saturation and value.

rgb_tinter.py

#!/usr/bin/env python3

# Takes a list of (A)RGB colors as hex strings and 
# applies the first color's hue value as a tint to 
# every other color while preserving saturation, value and alpha.

# Supported hex formats: RGB, ARGB

# usage: {command} {tint reference color} {first color to tint} [{more colors to tint} ...]
# example usage: rgb_tinter.py "#ff00ff" "#123456" "#abcdef" "#001122"


import matplotlib.colors as colors
import colorsys
import sys

BYTE_MAX = 255

def hex2floatRgb(hexString):
	colorBytes = bytearray.fromhex(hexString)
	colorValues = []
	for b in colorBytes:
		colorValues.append(float(b) / BYTE_MAX)
	return colorValues

def floatRgb2Hsv(floatRgb):
	r = floatRgb[0]
	g = floatRgb[1]
	b = floatRgb[2]
	return colorsys.rgb_to_hsv(r, g, b)

def hsv2hexRgb(h, s, v):
	rgb = colorsys.hsv_to_rgb(h, s, v)
	hexRgb = colors.rgb2hex(rgb)
	return hexRgb

def hexRgb2Hsv(hexRgb):
	colorFloatRgb = hex2floatRgb(hexRgb)
	return floatRgb2Hsv(colorFloatRgb)


source = sys.argv[1][1:]
targets = sys.argv[2:]

sourceHsv = hexRgb2Hsv(source)
sourceHue = sourceHsv[0]

for colorHex in targets:
	colorHex = colorHex[1:]

	alpha = ''
	if len(colorHex) > 6:
		alpha = colorHex[0:2]

	colorHsv = hexRgb2Hsv(colorHex)
	tintedColor = hsv2hexRgb(sourceHue, colorHsv[1], colorHsv[2])
	tintedColor = '#' + alpha + tintedColor[1:]
	print('%s --> %s' % (colorHex, tintedColor))