Custom Segmentation Colors

const colorMapId = 'HelloWorld';
const colormap = cornerstone.colors.getColormap(colorMapId);
const distinctColors = [
  [255, 255, 255, 255],
  [60, 180, 175, 255],
  [255, 225, 25, 255],
  [0, 130, 200, 255],
];

colormap.setNumberOfColors(distinctColors.length);

for (let i = 0; i < distinctColors.length; i++) {
  colormap.setColor(i, distinctColors[i]);
}

cornerstoneTools.store.modules.brush.state.colorMapId = colorMapId;