Hex #406d5d or rgb(64,109,93) in RGB space is the tint of greenish cian. It has hue angle of 158.67 degrees, value = 43 and saturation = 41. #406d5d can be obtained by mixing 4 colors: 3 drops of yellow, 5 drops of blue, 1 drop of cyan, 3 drops of black.
Nearest safe hex - #336666. Below you can see the block with #406d5d color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #406d5d to the mixer and play with it.