Hex #00587a or rgb(0,88,122) in RGB space is the tint of bluish cian. It has hue angle of 196.72 degrees, value = 48 and saturation = 100. #00587a can be obtained by mixing 3 colors: 2 drops of blue, 2 drops of cyan, 3 drops of black.
Nearest safe hex - #006666. Below you can see the block with #00587a color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #00587a to the mixer and play with it.