Hex #1a9591 or rgb(26,149,145) in RGB space is the tint of cyan. It has hue angle of 178.05 degrees, value = 58 and saturation = 83. #1a9591 can be obtained by mixing 4 colors: 1 drop of yellow, 1 drop of blue, 5 drops of cyan, 3 drops of black.
Nearest safe hex - #339999. Below you can see the block with #1a9591 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #1a9591 to the mixer and play with it.