Color: added support for add color values using uppercase

[puxiao]

Related issue: null

Description

I think it's a bad experience.

const material = new Three.MeshPhongMaterial({ 
	color: 'Red'
})

⚠️warn: THREE.Color: Unknown color Red

So...

-	const hex = _colorKeywords[ style ];
+	const hex = _colorKeywords[ style.toLowerCase() ];

[Mugen87]

In this case, then end of the following sentence in the documentation can be removed.

three.js/docs/api/en/math/Color.html

Line 313 in 342946c

Note that for X11 color names, multiple words such as Dark Orange become the string 'darkorange' (all lowercase).

[Mugen87]

@puxiao I've meant to just delete (all lowercase), not the entire sentence^^.

[puxiao]

Oops... Do I need to recover?

[Mugen87]

Yes, that would be good. And then just remove (all lowercase).

[mrdoob]

Thanks!