Hex #4091a0 or rgb(64,145,160) in RGB space is the tint of bluish cian. It has hue angle of 189.38 degrees, value = 63 and saturation = 60. #4091a0 can be obtained by mixing 4 colors: 1 drop of yellow, 1 drop of red, 3 drops of blue, 3 drops of cyan.
Nearest safe hex - #339999. Below you can see the block with #4091a0 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #4091a0 to the mixer and play with it.