Hex #304a4b or rgb(48,74,75) in RGB space is the tint of cyan. It has hue angle of 182.22 degrees, value = 29 and saturation = 36. #304a4b can be obtained by mixing 4 colors: 3 drops of magenta, 4 drops of blue, 5 drops of green, 4 drops of black.
Nearest safe hex - #333333. Below you can see the block with #304a4b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #304a4b to the mixer and play with it.