Hex #0090a3 or rgb(0,144,163) in RGB space is the tint of cyan. It has hue angle of 186.99 degrees, value = 64 and saturation = 100. #0090a3 can be obtained by mixing 4 colors: 3 drops of blue, 5 drops of cyan, 1 drop of green, 2 drops of black.
Nearest safe hex - #009999. Below you can see the block with #0090a3 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #0090a3 to the mixer and play with it.