Hex #1a9b91 or rgb(26,155,145) in RGB space is the tint of cyan. It has hue angle of 175.35 degrees, value = 61 and saturation = 83. #1a9b91 can be obtained by mixing 4 colors: 1 drop of magenta, 5 drops of cyan, 2 drops of green, 2 drops of black.
Nearest safe hex - #339999. Below you can see the block with #1a9b91 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #1a9b91 to the mixer and play with it.