To manipulate colors we will modify the argb (Alpha, Red, Green and Blue) values of a color.
First extract RGB values from your color.
int yourColor = Color.parse("#ae1f67");
int red = Color.red(yourColor);
int green = Color.green(yourColor);
int blue = Color.blue(yourColor);
Now you can reduce or increase red, green, and blue values and combine them to be a color again:
int newColor = Color.rgb(red, green, blue);
Or if you want to add some alpha to it, you can add it while creating the color:
int newColor = Color.argb(alpha, red, green, blue);
Alpha and RGB values should be in the range [0-225].