Hex #4088aa or rgb(64,136,170) in RGB space is the tint of bluish cian. It has hue angle of 199.25 degrees, value = 67 and saturation = 62. #4088aa can be obtained by mixing 3 colors: 1 drop of red, 1 drop of blue, 2 drops of cyan.
Nearest safe hex - #339999. Below you can see the block with #4088aa color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #4088aa to the mixer and play with it.