Aaaaand in case that doesn't explain it: hexadecimal numbers work in the following fashion, increasing in this order from lowest to highest:
0123456789abcdef
A Hex value in regards to colors operates, as Akira mentioned, in the format of #(two-digit value for red)(two-digit value for green)(two-digit value for blue).
For pure blue, you'd want #0000ff as the selected value. |