Hex #006b5b or rgb(0,107,91) in RGB space is the tint of greenish cian. It has hue angle of 171.03 degrees, value = 42 and saturation = 100. #006b5b can be obtained by mixing 4 colors: 4 drops of blue, 3 drops of cyan, 4 drops of green, 5 drops of black.
Nearest safe hex - #006666. Below you can see the block with #006b5b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #006b5b to the mixer and play with it.