Hex #277c7d or rgb(39,124,125) in RGB space is the tint of cyan. It has hue angle of 180.70 degrees, value = 49 and saturation = 69. #277c7d can be obtained by mixing 4 colors: 2 drops of red, 5 drops of blue, 3 drops of cyan, 3 drops of green.
Nearest safe hex - #336666. Below you can see the block with #277c7d color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #277c7d to the mixer and play with it.