Hex #157087 or rgb(21,112,135) in RGB space is the tint of bluish cian. It has hue angle of 192.11 degrees, value = 53 and saturation = 84. #157087 can be obtained by mixing 4 colors: 2 drops of blue, 4 drops of cyan, 1 drop of white, 5 drops of black.
Nearest safe hex - #006699. Below you can see the block with #157087 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #157087 to the mixer and play with it.