method WebGLRenderingContext.prototype.blendColorimport { WebGLRenderingContext } from "https://deno.land/x/gluten@0.1.7/mod.ts"; blendColor(r: number,g: number,b: number,a: number,)Sets the source and destination blending factors. Parametersr: numberred value g: numbergreen value b: numberblue value a: numberalpha value