Hex #558d6a or rgb(85,141,106) in RGB space is the tint of teal. It has hue angle of 142.50 degrees, value = 55 and saturation = 40. #558d6a can be obtained by mixing 4 colors: 2 drops of yellow, 3 drops of cyan, 2 drops of white, 5 drops of black.
Nearest safe hex - #669966. Below you can see the block with #558d6a color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #558d6a to the mixer and play with it.