Coffee Space 
Sometimes you want to mix two HTML colours together. This Python code was initially written prior to the colour selection algorithm, where colours were manually defined and I needed a way to generate new colours.
Other reasons for wanting such code is to blend HTML colours for a colour picker, or as part of some colour generation tool.
Here is the code that achieves this (using basic linear mixing):
0001 # mix_col() 0002 # 0003 # Mix two colours together and return the results hex string. 0004 # 0005 # @param a The first colour. 0006 # @param b The second colour. 0007 # @param ratio A value between 0 and 1 to indicate the mixing ratio. 0008 # @return The resulting colour. 0009 def mix_col(a, b, ratio) : 0010 x = int(a[1:], 16) 0011 x_r = (x & 0xFF0000) >> 16 0012 x_g = (x & 0x00FF00) >> 8 0013 x_b = (x & 0x0000FF) 0014 y = int(b[1:], 16) 0015 y_r = (y & 0xFF0000) >> 16 0016 y_g = (y & 0x00FF00) >> 8 0017 y_b = (y & 0x0000FF) 0018 c_r = int((x_r * ratio) + (y_r * (1 - ratio))) 0019 c_g = int((x_g * ratio) + (y_g * (1 - ratio))) 0020 c_b = int((x_b * ratio) + (y_b * (1 - ratio))) 0021 c = (c_r << 16) | (c_g << 8) | c_b 0022 r = hex(c)[2:] 0023 while len(r) < 6 : 0024 r = "0" + r 0025 return "#" + r
As you can see, a is the first HTML colour, b is the second HTML colour and ratio is the mixing ratio between the two HTML colours.
An improvement to this code would allow for the type of colour mixing and allow for different blend modes.