Hex #506b5b or rgb(80,107,91) in RGB space is the tint of teal. It has hue angle of 144.44 degrees, value = 42 and saturation = 25. #506b5b can be obtained by mixing 4 colors: 5 drops of red, 4 drops of blue, 3 drops of cyan, 4 drops of green.
Nearest safe hex - #666666. Below you can see the block with #506b5b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #506b5b to the mixer and play with it.