isValid() function returning true for invalid hsl or rgb colors

[mburakerman]

Thanks for awesome library!

Theres is small issues about isValid() function.

Unless we don't write a letter, isValid() function returns true for rgb and hsl colors.

alert(tinycolor('hsla(642,14%,76%,1)').isValid())

jsfiddle

[defue]

Also #fafa is treated as valid color while it is not. Version 1.4.1.
Update: figured out that #fafa is a valid color according to the specs: https://drafts.csswg.org/css-color-4/#hex-notation

[whostolemyhat]

Hex colours with two hashes are also considered valid:

tinycolor('##abc123').isValid() // true

[nyteksf]

Hello. I've posted this related PR here for review, please. I was not able to reproduce the above mentioned double pound sign error with hex colors, but I did manage to address preventing multiple commas and choosing from without the valid range. Thanks for your time.