Hex #306f65 or rgb(48,111,101) in RGB space is the tint of greenish cian. It has hue angle of 170.48 degrees, value = 44 and saturation = 57. #306f65 can be obtained by mixing 4 colors: 3 drops of yellow, 5 drops of blue, 3 drops of cyan, 5 drops of black.
Nearest safe hex - #336666. Below you can see the block with #306f65 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #306f65 to the mixer and play with it.