Hex #15ae80 or rgb(21,174,128) in RGB space is the tint of greenish cian. It has hue angle of 161.96 degrees, value = 68 and saturation = 88. #15ae80 can be obtained by mixing 4 colors: 3 drops of blue, 3 drops of cyan, 5 drops of green, 1 drop of white.
Nearest safe hex - #009999. Below you can see the block with #15ae80 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #15ae80 to the mixer and play with it.