switch hex-rgb to polished parseToRgb

[jameslnewell]

Description

Temporary fix for the issue discussed in #17963 (comment)

Replaced the hex-rgb package+function for polished's parseToRgb function since the hex-rgb package doesn't provide any transpiled modules.

Polished is 10kb gziped but highly treeshakable.

How has this been tested?

Ran unit tests, checked the storybooks.

Screenshots

No visual changes.

Types of changes

Bug fix.

Checklist:

• My code is tested.
• My code follows the WordPress code style.
• My code follows the accessibility standards.
• My code has proper inline documentation.
• I've included developer documentation if appropriate.
• I've updated all React Native files affected by any refactorings/renamings in this PR. .

closes #18719

[aduth]

Thanks for jumping on this so quickly.

One downside here is that it's about a 1400% size increase from hex-rgb (0.7kb to 10.6kb).

I can plan to look a little closer in my morning. It'd be good to have this resolved in time for next week's release, so if it comes down to it, we can live with the larger bundle until another solution presents itself.

[jameslnewell]

Yeah if treeshaking isn't supported its a big hit. I can see a few alternatives but they're only 50% better:

• color-convert - 5kb, no treeshaking, updated 3 months ago
• tinycolor2 - 5kb, no treeshaking, updated 3 years ago

[youknowriad]

I think we already have tinycolor2 in our bundles. We could use it instead right?

[ItsJonQ]

@jameslnewell Ah, you folks are so fast! You jumped on this before I could :)
I was going to suggest using tinycolor2 since it was already there. My apologies for not realizing that when I submitted my original PR.

Thanks for the heads up @youknowriad + @aduth !

[aduth]

Polished is 10kb gziped but highly treeshakable.

Based on what I see in that link, it's not very well tree-shaken, since the total bundle is 10.8kb gzipped, and the single parseToRgb function is still 10.6kb.

I've pushed up a change here to use tinycolor2, since as mentioned we already have it available in the module.

[aduth]

Assuming latest changes look good to you, I think we can merge this 👍