Hex #558b6c or rgb(85,139,108) in RGB space is the tint of teal. It has hue angle of 145.56 degrees, value = 55 and saturation = 39. #558b6c can be obtained by mixing 4 colors: 3 drops of red, 2 drops of magenta, 5 drops of cyan, 5 drops of green.
Nearest safe hex - #669966. Below you can see the block with #558b6c color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #558b6c to the mixer and play with it.