Hex #1580c0 or rgb(21,128,192) in RGB space is the tint of bluish cian. It has hue angle of 202.46 degrees, value = 75 and saturation = 89. #1580c0 can be obtained by mixing 4 colors: 1 drop of magenta, 5 drops of blue, 5 drops of cyan, 1 drop of black.
Nearest safe hex - #0099cc. Below you can see the block with #1580c0 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #1580c0 to the mixer and play with it.