Hex #005a56 or rgb(0,90,86) in RGB space is the tint of cyan. It has hue angle of 177.33 degrees, value = 35 and saturation = 100. #005a56 can be obtained by mixing 3 colors: 5 drops of blue, 3 drops of green, 2 drops of black.
Nearest safe hex - #006666. Below you can see the block with #005a56 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #005a56 to the mixer and play with it.