Hex #4d5b6f or rgb(77,91,111) in RGB space is the tint of blue. It has hue angle of 215.29 degrees, value = 44 and saturation = 31. #4d5b6f can be obtained by mixing 3 colors: 2 drops of blue, 3 drops of white, 5 drops of black.
Nearest safe hex - #666666. Below you can see the block with #4d5b6f color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #4d5b6f to the mixer and play with it.