Hex #406e6b or rgb(64,110,107) in RGB space is the tint of cyan. It has hue angle of 176.09 degrees, value = 43 and saturation = 42. #406e6b can be obtained by mixing 4 colors: 1 drop of yellow, 1 drop of magenta, 4 drops of blue, 2 drops of green.
Nearest safe hex - #336666. Below you can see the block with #406e6b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #406e6b to the mixer and play with it.