Hex #4d8980 or rgb(77,137,128) in RGB space is the tint of greenish cian. It has hue angle of 171.00 degrees, value = 54 and saturation = 44. #4d8980 can be obtained by mixing 4 colors: 3 drops of red, 5 drops of cyan, 1 drop of green, 1 drop of black.
Nearest safe hex - #669999. Below you can see the block with #4d8980 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #4d8980 to the mixer and play with it.