I tested the https://www.google.com/search?hl=en&q=color%20picker https://www.google.com/search?hl=en&q=color%20picker and when refreshing the page it shows one

I tested the https://www.google.com/search?hl=en&q=color%20picker https://www.google.com/search?hl=en&q=color%20picker and when refreshing the page it shows one of 4 colors: blue, red, green, yellow-ish/orange. It's likely that by pure chance (1 of 4) you saw those.