toRgb and similar functions should take into account already converted colors

[Tokimon]

The functions toRgb, toHsl etc. are some practical functions, but only if the given color is a string. It could be very nice if they could take into account colors that have already been converted by fx. hexToRgb like:

toHsl(hexToRgb('#ffdd56'))

The above code will fail because the argument passed into toHsl is no longer a string. This is useful when you make a utility function that takes in some sort of color and you just want to make sure that it is a rgb object for manipulating.

concretely I have some code like this:

// My utility function
export const mix = (base, mixed, mixPct) => {
  mixPct = pct(mixPct);

  if (mixPct === 1) { return isString(mixed) ? mixed : formatRgb(mixed); }
  if (mixPct === 0) { return isString(base) ? base : formatRgb(base); }

  if (isString(base)) { base = toRgb(base); }
  if (isString(mixed)) { mixed = toRgb(mixed); }

  const clr = colorMix(base, mixed, mixPct);
  return formatRgb(clr);
};

It could be nice not to have to do:

if (isString(base)) { base = toRgb(base); }
if (isString(mixed)) { mixed = toRgb(mixed); }

just because I want to make sure the color is in the RGB format.

In my case I am testing it something like this:

  it('Should mix "rgba" colors', () => {
      const baseRgba = toRgb('#f3bc56');
      baseRgba.alpha = 0.4;

      const mixedRgba = toRgb('#53fcd6');
      mixedRgba.alpha = 0.6;

      expect(mix(baseRgba, mixedRgba, 40)).toBe('rgba(179,213,137,0.48)');
    });

[Tokimon]

On a side note to this, it could be cool if the mix method could do the conversion under the hood so I don't have use toRgb (or similar) before to perform the mixture.

So this:

mix('#f0b', '#b1f', 0.5);

Instead_ of this:

mix(hexToRgb('#f0b'),hexToRgb( '#b1f'), 0.5);