Provided three int values, this will return a valid hex triplet representing a color. If those values are between [0,255], then it will treat those as RGB values and return the color corresponding to those values.

rgb2hex.py

# Provided three int values, this will return a valid hex triplet representing a color.
# If those values are between [0,255], then it will treat those as RGB values and return the color corresponding to those values.

# This uses the preferred method of string formatting, as described in PEP 3101.
# It also uses min() and max to ensure that 0 <= {r,g,b} <= 255.


def main():
    # Let's say you get the parameters as string
    parameter = "130,132,245"

    # You first need to split it into 3 numbers
    r, g, b = map(int, parameter.split(","))

    stroke = "#{0:02x}{1:02x}{2:02x}".format(clamp(r), clamp(g), clamp(b))

    print(stroke)
    # Result : #8284f5


def clamp(x):
    return max(0, min(x, 255))


main()