Hex #128455 or rgb(18,132,85) in RGB space is the tint of teal. It has hue angle of 155.26 degrees, value = 52 and saturation = 86. #128455 can be obtained by mixing 4 colors: 1 drop of magenta, 4 drops of cyan, 5 drops of green, 4 drops of black.
Nearest safe hex - #009966. Below you can see the block with #128455 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #128455 to the mixer and play with it.