Allow easier reverse engineering

[lucashoeft]

Sometimes, I only have the UIColor and want to get the hex-value so it would be good to allow input like UIColor(red:0.07, green:0.20, blue:0.34, alpha:1.0).

[getaaron]

Would like this too. Also should take input like #colorLiteral(red: 0.707616508, green: 0.9204675555, blue: 0.7929434776, alpha: 1). CC @manosim

[LabLamb]

Would like this too. Also should take input like #colorLiteral(red: 0.707616508, green: 0.9204675555, blue: 0.7929434776, alpha: 1). CC @manosim

Made a PR catering this too.