Hex #507f9a or rgb(80,127,154) in RGB space is the tint of bluish cian. It has hue angle of 201.89 degrees, value = 60 and saturation = 48. #507f9a can be obtained by mixing 4 colors: 4 drops of blue, 2 drops of cyan, 5 drops of white, 5 drops of black.
Nearest safe hex - #666699. Below you can see the block with #507f9a color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #507f9a to the mixer and play with it.