Hex #1590b9 or rgb(21,144,185) in RGB space is the tint of bluish cian. It has hue angle of 195.00 degrees, value = 73 and saturation = 89. #1590b9 can be obtained by mixing 4 colors: 4 drops of blue, 5 drops of cyan, 1 drop of white, 2 drops of black.
Nearest safe hex - #0099cc. Below you can see the block with #1590b9 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #1590b9 to the mixer and play with it.