In the CSS basics exercise use-css-variables-to-change-several-elements-at-once/
the exercise doesn’t recognize the spelling grey as valid while HTML does. This can result in a false negative.
Only spelling gray is recognized as valid by the exercise.
penguin class, change the
black value to
gray , the
gray value to
white , and the
yellow value to
It specifically states to use the CSS color
gray. If you’re using
grey, even if it’s recognized by your browser, you’ve missed the mark. Not a CSS bug, simply a misinterpretation of the given spec.