Hex #1a9f91 or rgb(26,159,145) in RGB space is the tint of cyan. It has hue angle of 173.68 degrees, value = 62 and saturation = 84. #1a9f91 can be obtained by mixing 4 colors: 1 drop of yellow, 4 drops of blue, 3 drops of cyan, 2 drops of green.
Nearest safe hex - #339999. Below you can see the block with #1a9f91 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #1a9f91 to the mixer and play with it.