def getHSL(r, g, b):
# sources:
# https://stackoverflow.com/questions/39118528/rgb-to-hsl-conversion
# https://www.niwa.nu/2013/05/math-behind-colorspace-conversions-rgb-hsl/
# get base hue value
r /= 255
g /= 255
b /= 255
maximum = max([r, g, b])
minimum = min([r, g, b])
chroma = maximum - minimum
if chroma == 0:
hue = 0
else:
s = Switch(maximum)
if s.case(r):
segment = (g - b) / chroma
shift = 0
if segment < 0:
shift = 6
if s.case(g):
segment = (b - r) / chroma
shift = 2
if s.case(b):
segment = (r - g) / chroma
shift = 4
hue = (segment + shift) * 60
# get base luminace value
luminace = (minimum + maximum) / 2
# get base saturation value
if maximum == minimum:
saturation = 0
else:
if luminace < 0.5:
saturation = chroma / (2 * luminace)
else:
saturation = chroma / (2 * (1 - luminace))
saturation *= 100
# reformat values
luminace *= 100
if hue % 1 == 0:
hue = int(hue)
else:
hue = round(hue, 2)
if saturation % 1 == 0:
saturation = int(saturation)
else:
saturation = round(saturation, 3)
if luminace % 1 == 0:
luminace = int(luminace)
else:
luminace = round(luminace, 3)
return "HSL(" + str(hue) + "," + str(saturation) + "%," + str(
luminace) + "%)"
def getHex(num):
# assumes an integer between 0 and 255
hexString = ''
# get first digit
s = Switch(math.floor(num / 16))
if s.case(10):
hexString = hexString + 'A'
if s.case(11):
hexString = hexString + 'B'
if s.case(12):
hexString = hexString + 'C'
if s.case(13):
hexString = hexString + 'D'
if s.case(14):
hexString = hexString + 'E'
if s.case(15):
hexString = hexString + 'F'
if s.default():
hexString = hexString + str(math.floor(num / 16))
# get second digit
s.restart(num % 16)
if s.case(10):
hexString = hexString + 'A'
if s.case(11):
hexString = hexString + 'B'
if s.case(12):
hexString = hexString + 'C'
if s.case(13):
hexString = hexString + 'D'
if s.case(14):
hexString = hexString + 'E'
if s.case(15):
hexString = hexString + 'F'
if s.default():
hexString = hexString + str(num % 16)
return hexString
