Hex #606f6b or rgb(96,111,107) in RGB space is the tint of greenish cian. It has hue angle of 164.00 degrees, value = 44 and saturation = 14. #606f6b can be obtained by mixing 4 colors: 1 drop of yellow, 2 drops of blue, 2 drops of white, 3 drops of black.
Nearest safe hex - #666666. Below you can see the block with #606f6b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #606f6b to the mixer and play with it.