Hex #145f6f or rgb(20,95,111) in RGB space is the tint of bluish cian. It has hue angle of 190.55 degrees, value = 44 and saturation = 82. #145f6f can be obtained by mixing 4 colors: 1 drop of yellow, 4 drops of blue, 3 drops of cyan, 5 drops of black.
Nearest safe hex - #006666. Below you can see the block with #145f6f color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #145f6f to the mixer and play with it.