Hex #1a9cd5 or rgb(26,156,213) in RGB space is the tint of bluish cian. It has hue angle of 198.29 degrees, value = 84 and saturation = 88. #1a9cd5 can be obtained by mixing 3 colors: 5 drops of blue, 4 drops of cyan, 1 drop of white.
Nearest safe hex - #3399cc. Below you can see the block with #1a9cd5 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #1a9cd5 to the mixer and play with it.