Hex #1a7780 or rgb(26,119,128) in RGB space is the tint of cyan. It has hue angle of 185.29 degrees, value = 50 and saturation = 80. #1a7780 can be obtained by mixing 3 colors: 1 drop of red, 5 drops of cyan, 4 drops of black.
Nearest safe hex - #336699. Below you can see the block with #1a7780 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #1a7780 to the mixer and play with it.