public HaloRenderData setMultiColourAlphas(byte[] alphas) {
            levelGlowRgba = getBlendedColour(alphas, HaloContext.LEVEL_GLOW);
            inventoryGlowRgba = getBlendedColour(alphas, HaloContext.ITEM_GLOW);
            bloomRgba = getBlendedColour(alphas, HaloContext.BLOOM);
            return this;
        }
Colours used for Halo glow and bloom effects. They are traditional Minecraft
wool colours with scaled brightness components to reduce variation in
perceived brightness.
core/src/main/java/mrtjp/projectred/core/client/HaloRenderer.java