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).

Happy to open a pull request but how would you feel about updating the formatting?

UIColor(red:0.94, green:0.18, blue:0.17, alpha:1.0)

to include a space after the ':'

UIColor(red: 0.94, green: 0.18, blue: 0.17, alpha: 1.0)

Would be neat to show NSColor values, for those of us who write for macOS :) Currently it's already useful by doing the math automatically. Thanks!

Hi!
First off, thanks for your excellent work of providing this tool. It was one of the first hits when searching using google. The UI looks nice too.

I found that using just two digits for the decimal part will loose precision during conversion. RGB is 256 levels (0-255) and two digit precision will only allow 100 levels (00-99), loosing about half of the precision. Picky QA will notice this when using color picker tool.

I don't know if you still maintain this page or not, but a simple solution would be either to just increase precision to 3 digits or allow for changing the precision in the UI.
I tested the latter approach, providing an additional input field for setting the precision. I made a simple deploy using github pages at https://ui-color.klaesson.net if you want to try it out. I defaulted to 4 digits (but can be set to whatever, 3 will probably be sufficient). I could probably create a PR too if you want.

#010101 encodes to UIColor(red: 0.00, blue: 0.00, green: 0.00), which proves precision is lost.

Assuming Apple uses 32 bit color underneath it all, we've thus lost information.

None of copyObjectiveC, copySwift, copyXamarin buttons work.
I use Safari Version 11.0, macOS Sierra 10.12.6

And thx for useful tool, btw 👍

8 digits hex color codes should be allowed instead of alpha field.

Love the site.

My one suggestion would be that the Cocoa standard seems to usually be /255 fractions:

[UIColor colorWithRed:145.0/255.0 green:76.0/255.0 blue:76.0/255.0 alpha:1];

Rather than uicolor.io's decimal output:

[UIColor colorWithRed:0.57 green:0.30 blue:0.30 alpha:1.0];

Although more verbose, the former allows for easy human parsing of the RGB colors from the UIColor code.