Hex #12587a or rgb(18,88,122) in RGB space is the tint of bluish cian. It has hue angle of 199.62 degrees, value = 48 and saturation = 85. #12587a can be obtained by mixing 4 colors: 1 drop of red, 4 drops of blue, 4 drops of cyan, 5 drops of black.
Nearest safe hex - #006666. Below you can see the block with #12587a color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #12587a to the mixer and play with it.