Hex #509385 or rgb(80,147,133) in RGB space is the tint of greenish cian. It has hue angle of 167.46 degrees, value = 58 and saturation = 46. #509385 can be obtained by mixing 4 colors: 5 drops of blue, 4 drops of green, 5 drops of white, 2 drops of black.
Nearest safe hex - #669999. Below you can see the block with #509385 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #509385 to the mixer and play with it.