Hex #4d9b91 or rgb(77,155,145) in RGB space is the tint of greenish cian. It has hue angle of 172.31 degrees, value = 61 and saturation = 50. #4d9b91 can be obtained by mixing 4 colors: 2 drops of red, 1 drop of magenta, 5 drops of cyan, 2 drops of green.
Nearest safe hex - #669999. Below you can see the block with #4d9b91 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #4d9b91 to the mixer and play with it.