Hex #2b789d or rgb(43,120,157) in RGB space is the tint of bluish cian. It has hue angle of 199.47 degrees, value = 62 and saturation = 73. #2b789d can be obtained by mixing 3 colors: 4 drops of blue, 1 drop of green, 1 drop of white.
Nearest safe hex - #336699. Below you can see the block with #2b789d color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #2b789d to the mixer and play with it.