Function withAlpha

src/core/createRenderCoordinator.ts:575–580

(cssColor: string, alphaMultiplier: number)

};

const withAlpha = (cssColor: string, alphaMultiplier: number): string => {
  const parsed = parseCssColorToRgba01(cssColor);
  if (!parsed) return cssColor;
  const a = Math.max(0, Math.min(1, parsed[3] * alphaMultiplier));
  return rgba01ToCssRgba([parsed[0], parsed[1], parsed[2], a]);
};

/**
 * Estimates the maximum width of Y-axis tick labels in CSS pixels.