Hex #005b5b or rgb(0,91,91) in RGB space is the tint of cyan. It has hue angle of 180.00 degrees, value = 36 and saturation = 100. #005b5b can be obtained by mixing 4 colors: 5 drops of blue, 2 drops of cyan, 3 drops of green, 5 drops of black.
Nearest safe hex - #006666. Below you can see the block with #005b5b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #005b5b to the mixer and play with it.