Hex #609e90 or rgb(96,158,144) in RGB space is the tint of greenish cian. It has hue angle of 166.45 degrees, value = 62 and saturation = 39. #609e90 can be obtained by mixing 4 colors: 1 drop of magenta, 5 drops of blue, 5 drops of green, 5 drops of white.
Nearest safe hex - #669999. Below you can see the block with #609e90 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #609e90 to the mixer and play with it.