Hex #2b7780 or rgb(43,119,128) in RGB space is the tint of cyan. It has hue angle of 186.35 degrees, value = 50 and saturation = 66. #2b7780 can be obtained by mixing 3 colors: 1 drop of red, 3 drops of cyan, 2 drops of black.
Nearest safe hex - #336699. Below you can see the block with #2b7780 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #2b7780 to the mixer and play with it.