Tier 6 · Adeptmatch
Colour Or Color
Match both the British and American spellings of "colour".
? makes the preceding item optional — zero or one of it.
Your pattern0 chars · par 7
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Flags
Start typing — tests run as you go.0 of 5 visible tests passing
Test cases
colormust matchcolourmust matchbackground-color: redmust matchcolrmust not matchcolouurmust not match
+ 3 hidden tests, checked when you submit. They are what stops a pattern that only fits the examples above.