withAlphaVariable.js

function withAlphaVariable({ color, property, variable }) {
  if (_.isFunction(color)) {
    return {
      [property]: color(variable),
    }
  }

  try {
    const [r, g, b, a] = toRgba(color)

    if (a !== undefined) {
      return {
        [property]: color,
      }
    }

    return {
      [variable]: '1',
      [property]: [color, `rgba(${r}, ${g}, ${b}, var(${variable}))`],
    }
  } catch (error) {
    return {
      [property]: color,
    }
  }
}