Hex #12b792 or rgb(18,183,146) in RGB space is the tint of greenish cian. It has hue angle of 166.55 degrees, value = 72 and saturation = 90. #12b792 can be obtained by mixing 4 colors: 3 drops of blue, 5 drops of cyan, 5 drops of green, 1 drop of white.
Nearest safe hex - #00cc99. Below you can see the block with #12b792 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #12b792 to the mixer and play with it.