Err... not quite right.
With colour, we represent it in our UI in two ways, RGB and the hex representation.
RGB is represented as values between 0 and 255 (8 bit per component).
The colour can also be represented as hex (base 16) which uses characters 0-9 and A-F, 2 characters per component therefore, 8-bits.
So #374c5c is actually, #37 for R, #4c for G and #5c for B.
Using a hex to decimal convertor like this one: http://www.binaryhexconverter.com/hex-to-decimal-converter
#37 is 55 (R)
#4c is 76 (G)
#5c is 92 (B)
To normalise a component value so it's between 0-1, you divide the value by the component's max value, 255 in this case.
var color = pc.Color(55/255, 76/255, 92/255);
// which comes out to roughly as pc.Color(0.2156, 0.2980, 0.3607);