Hex #12ab8c or rgb(18,171,140) in RGB space is the tint of greenish cian. It has hue angle of 167.84 degrees, value = 67 and saturation = 89. #12ab8c can be obtained by mixing 4 colors: 4 drops of blue, 4 drops of cyan, 5 drops of green, 1 drop of white.
Nearest safe hex - #009999. Below you can see the block with #12ab8c color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #12ab8c to the mixer and play with it.