Hex #307b65 or rgb(48,123,101) in RGB space is the tint of greenish cian. It has hue angle of 162.40 degrees, value = 48 and saturation = 61. #307b65 can be obtained by mixing 4 colors: 3 drops of red, 5 drops of blue, 3 drops of cyan, 5 drops of green.
Nearest safe hex - #336666. Below you can see the block with #307b65 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #307b65 to the mixer and play with it.