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So I tried this and even https://colors.artyclick.com/color-name-finder/ but it will find only brown/gold and light blue/blue/white depends where you focus it on. This image itself contains no black pixels simple as it is.
See I get nothing but blue and gold… Which is the entire crux of the illusion lol. Your brain just makes up for the color shift due to previous images it’s seen with washed out saturation due to ISO / artificial light boost.
https://i.imgur.com/iJBt2Mj.png