Hex #307f75 or rgb(48,127,117) in RGB space is the tint of greenish cian. It has hue angle of 172.41 degrees, value = 50 and saturation = 62. #307f75 can be obtained by mixing 4 colors: 3 drops of red, 5 drops of blue, 4 drops of cyan, 4 drops of green.
Nearest safe hex - #336666. Below you can see the block with #307f75 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #307f75 to the mixer and play with it.