Hex #154047 or rgb(21,64,71) in RGB space is the tint of bluish cian. It has hue angle of 188.40 degrees, value = 28 and saturation = 70. #154047 can be obtained by mixing 4 colors: 1 drop of yellow, 5 drops of blue, 1 drop of green, 5 drops of black.
Nearest safe hex - #003333. Below you can see the block with #154047 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #154047 to the mixer and play with it.