Hex #5d81a3 or rgb(93,129,163) in RGB space is the tint of blue. It has hue angle of 209.14 degrees, value = 64 and saturation = 43. #5d81a3 can be obtained by mixing 4 colors: 3 drops of red, 3 drops of blue, 4 drops of cyan, 1 drop of white.
Nearest safe hex - #669999. Below you can see the block with #5d81a3 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #5d81a3 to the mixer and play with it.