RGBA to Hex Converter Online Tool

This online RGBA to Hex converter tool helps you to convert one RGBA color (base 10) into a Hex color (base 16), and test the result color within the website.

The RGBA color ("R" stands for "Red", "G" stands for "Green", "B" stands for "Blue") is specified how much red, green and blue light are combined together, and what the overall opacity. The syntax is rgba(16,110,190,0.7).

the Color System used in HTML is also be written down as Hex number, from #000000 (pure black) to #FFFFFF (pure white). For example, #123456 means the Red is "12" (in range "00" to "FF"), the Green is "34", the Blue is "56". The Hex color system also support 3-digits color, for example, color #e1a is equivalent to #ee11aa.

1. Step 1: Get the decimal number of each sub-color (Red, Green and Blue) and the opacity value.

2. Step 2: Convert each decimal number into hex number.

3. Step 3: Write the Hex Color result String in correct syntax.

Example: Convert RGBA Color "rgba(16,110,190,0.66)" to Hex Color (result is "#106ebe" with opacity 66%):

Wikipedia (Web colors): https://en.wikipedia.org/wiki/Web_colors

Wikipedia (RGBA color space): https://en.wikipedia.org/wiki/RGBA_color_space

import re


def rgb_to_hex(rgb_color):
    rgb_color = re.search('\(.*\)', rgb_color).group(0).replace(' ', '').lstrip('(').rstrip(')')
    [r, g, b] = [int(x) for x in rgb_color.split(',')]
    # check if in range 0~255
    assert 0 <= r <= 255
    assert 0 <= g <= 255
    assert 0 <= b <= 255

    r = hex(r).lstrip('0x')
    g = hex(g).lstrip('0x')
    b = hex(b).lstrip('0x')
    # re-write '7' to '07'
    r = (2 - len(r)) * '0' + r
    g = (2 - len(g)) * '0' + g
    b = (2 - len(b)) * '0' + b

    hex_color = '#' + r + g + b
    return hex_color


rgb_input = 'rgb(7,110,190)'
hex_output = rgb_to_hex(rgb_input)
print('Hex color result is:{0}'.format(hex_output))

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Hex color result is:#076ebe