Hex #00637c or rgb(0,99,124) in RGB space is the tint of bluish cian. It has hue angle of 192.10 degrees, value = 49 and saturation = 100. #00637c can be obtained by mixing 3 colors: 2 drops of blue, 4 drops of cyan, 5 drops of black.
Nearest safe hex - #006666. Below you can see the block with #00637c color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #00637c to the mixer and play with it.