“Color” and “Complications” is on my watch face. I can’t get out of this and want to return to my chosen watch face.

If the Watch Face Editor tool is still active when you read this, you should be able to get out of it easily enough. Just put your palm flat across the display to dismiss it (usually to black screen). Then look at the watch face you have now, and decide whether you need to go back into the editor to undo the modifications - or simply swipe from one face to another, depending where you ended up!

Change the watch face on your Apple Watch - Apple Support

Apple Watch User Guide - Apple Support

Or, simply press the digital crown in to close out of the edit screen for your watch face.