Hex #1c81bd or rgb(28,129,189) in RGB space is the tint of bluish cian. It has hue angle of 202.36 degrees, value = 74 and saturation = 85. #1c81bd can be obtained by mixing 4 colors: 1 drop of magenta, 3 drops of blue, 4 drops of cyan, 1 drop of black.
Nearest safe hex - #3399cc. Below you can see the block with #1c81bd color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #1c81bd to the mixer and play with it.