Hex #377f7a or rgb(55,127,122) in RGB space is the tint of cyan. It has hue angle of 175.83 degrees, value = 50 and saturation = 57. #377f7a can be obtained by mixing 4 colors: 3 drops of red, 4 drops of blue, 4 drops of cyan, 3 drops of green.
Nearest safe hex - #336666. Below you can see the block with #377f7a color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #377f7a to the mixer and play with it.