Hex #276c69 or rgb(39,108,105) in RGB space is the tint of cyan. It has hue angle of 177.39 degrees, value = 42 and saturation = 64. #276c69 can be obtained by mixing 4 colors: 5 drops of blue, 3 drops of green, 2 drops of white, 3 drops of black.
Nearest safe hex - #336666. Below you can see the block with #276c69 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #276c69 to the mixer and play with it.