Hex #125f4f or rgb(18,95,79) in RGB space is the tint of greenish cian. It has hue angle of 167.53 degrees, value = 37 and saturation = 81. #125f4f can be obtained by mixing 4 colors: 5 drops of blue, 4 drops of green, 1 drop of white, 4 drops of black.
Nearest safe hex - #006666. Below you can see the block with #125f4f color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #125f4f to the mixer and play with it.