Hex #0091d0 or rgb(0,145,208) in RGB space is the tint of bluish cian. It has hue angle of 198.17 degrees, value = 82 and saturation = 100. #0091d0 can be obtained by mixing 2 colors: 5 drops of blue, 4 drops of cyan.
Nearest safe hex - #0099cc. Below you can see the block with #0091d0 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #0091d0 to the mixer and play with it.