Hex #00678e or rgb(0,103,142) in RGB space is the tint of bluish cian. It has hue angle of 196.48 degrees, value = 56 and saturation = 100. #00678e can be obtained by mixing 3 colors: 1 drop of blue, 1 drop of cyan, 1 drop of black.
Nearest safe hex - #006699. Below you can see the block with #00678e color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #00678e to the mixer and play with it.