Hex #406979 or rgb(64,105,121) in RGB space is the tint of bluish cian. It has hue angle of 196.84 degrees, value = 47 and saturation = 47. #406979 can be obtained by mixing 4 colors: 3 drops of red, 1 drop of blue, 5 drops of cyan, 3 drops of black.
Nearest safe hex - #336666. Below you can see the block with #406979 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #406979 to the mixer and play with it.