Hex #557266 or rgb(85,114,102) in RGB space is the tint of teal. It has hue angle of 155.17 degrees, value = 45 and saturation = 25. #557266 can be obtained by mixing 4 colors: 5 drops of red, 3 drops of blue, 4 drops of cyan, 3 drops of green.
Nearest safe hex - #666666. Below you can see the block with #557266 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #557266 to the mixer and play with it.