Hex #4d9091 or rgb(77,144,145) in RGB space is the tint of cyan. It has hue angle of 180.88 degrees, value = 57 and saturation = 47. #4d9091 can be obtained by mixing 4 colors: 3 drops of red, 1 drop of blue, 5 drops of cyan, 1 drop of green.
Nearest safe hex - #669999. Below you can see the block with #4d9091 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #4d9091 to the mixer and play with it.