Hex #143742 or rgb(20,55,66) in RGB space is the tint of bluish cian. It has hue angle of 194.35 degrees, value = 26 and saturation = 70. #143742 can be obtained by mixing 4 colors: 1 drop of red, 5 drops of blue, 2 drops of green, 5 drops of black.
Nearest safe hex - #003333. Below you can see the block with #143742 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #143742 to the mixer and play with it.