Hex #377f9e or rgb(55,127,158) in RGB space is the tint of bluish cian. It has hue angle of 198.06 degrees, value = 62 and saturation = 65. #377f9e can be obtained by mixing 4 colors: 3 drops of magenta, 4 drops of blue, 4 drops of cyan, 3 drops of green.
Nearest safe hex - #336699. Below you can see the block with #377f9e color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #377f9e to the mixer and play with it.