Hex #71878e or rgb(113,135,142) in RGB space is the tint of bluish cian. It has hue angle of 194.48 degrees, value = 56 and saturation = 20. #71878e can be obtained by mixing 4 colors: 1 drop of yellow, 3 drops of blue, 3 drops of white, 2 drops of black.
Nearest safe hex - #669999. Below you can see the block with #71878e color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #71878e to the mixer and play with it.