Hex #406675 or rgb(64,102,117) in RGB space is the tint of bluish cian. It has hue angle of 196.98 degrees, value = 46 and saturation = 45. #406675 can be obtained by mixing 4 colors: 1 drop of blue, 1 drop of cyan, 2 drops of white, 4 drops of black.
Nearest safe hex - #336666. Below you can see the block with #406675 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #406675 to the mixer and play with it.