Hex #991589 or rgb(153,21,137) in RGB space is the tint of magenta. It has hue angle of 307.27 degrees, value = 60 and saturation = 86. #991589 can be obtained by mixing 4 colors: 1 drop of red, 5 drops of magenta, 3 drops of blue, 1 drop of black.
Nearest safe hex - #990099. Below you can see the block with #991589 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #991589 to the mixer and play with it.