Hex #669580 or rgb(102,149,128) in RGB space is the tint of teal. It has hue angle of 153.19 degrees, value = 58 and saturation = 32. #669580 can be obtained by mixing 4 colors: 1 drop of yellow, 3 drops of magenta, 3 drops of cyan, 3 drops of green.
Nearest safe hex - #669999. Below you can see the block with #669580 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #669580 to the mixer and play with it.