Hex #127b9e or rgb(18,123,158) in RGB space is the tint of bluish cian. It has hue angle of 195.00 degrees, value = 62 and saturation = 89. #127b9e can be obtained by mixing 4 colors: 4 drops of blue, 5 drops of cyan, 1 drop of white, 4 drops of black.
Nearest safe hex - #006699. Below you can see the block with #127b9e color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #127b9e to the mixer and play with it.