Hex #003140 or rgb(0,49,64) in RGB space is the tint of bluish cian. It has hue angle of 194.06 degrees, value = 25 and saturation = 100. #003140 can be obtained by mixing 3 colors: 3 drops of blue, 1 drop of green, 4 drops of black.
Nearest safe hex - #003333. Below you can see the block with #003140 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #003140 to the mixer and play with it.