getCurrentColorFormat( renderContext ) {

		let format;

		if ( renderContext.textures !== null ) {

			format = this.getTextureFormatGPU( renderContext.textures[ 0 ] );

		} else {

			format = this.getPreferredCanvasFormat(); // default context format

		}

		return format;

	}
Returns the default color attachment's GPU format of the current render context.

@param {RenderContext} renderContext - The render context.
@return {string} The GPU texture format of the default color attachment.