Tier 4 · Enchantermatch
Hex Colours
Match a valid CSS hex colour — a # followed by exactly three or six hex digits, and nothing else.
Three or six, not four or five. A repeated group is the neat way to say that: a group of three, taken once or twice.
Your pattern0 chars · par 24
//
Flags
Start typing — tests run as you go.0 of 7 visible tests passing
Test cases
#fffmust match#FFFFFFmust match#a1b2c3must match#ffffmust not match#12345must not matchfffmust not match#ggggggmust not match
+ 5 hidden tests, checked when you submit. They are what stops a pattern that only fits the examples above.