Hex #667a6c or rgb(102,122,108) in RGB space is the tint of bluish green. It has hue angle of 138.00 degrees, value = 48 and saturation = 16. #667a6c can be obtained by mixing 4 colors: 3 drops of yellow, 5 drops of blue, 3 drops of white, 4 drops of black.
Nearest safe hex - #666666. Below you can see the block with #667a6c color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #667a6c to the mixer and play with it.