Hex #00877b or rgb(0,135,123) in RGB space is the tint of cyan. It has hue angle of 174.67 degrees, value = 53 and saturation = 100. #00877b can be obtained by mixing 4 colors: 2 drops of blue, 3 drops of cyan, 2 drops of green, 2 drops of black.
Nearest safe hex - #009966. Below you can see the block with #00877b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #00877b to the mixer and play with it.