Hex #2491cf or rgb(36,145,207) in RGB space is the tint of bluish cian. It has hue angle of 201.75 degrees, value = 81 and saturation = 83. #2491cf can be obtained by mixing 3 colors: 4 drops of blue, 2 drops of cyan, 1 drop of white.
Nearest safe hex - #3399cc. Below you can see the block with #2491cf color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #2491cf to the mixer and play with it.