Only Connect

[klondike]

Connections
Puzzle #668
🟨🟨🟨🟨
🟦🟦🟦🟦
🟩🟩🟩🟩
🟪🟪🟪🟪

[GrannyMac]

Connections
Puzzle #668
🟩🟩🟩🟩
🟨🟨🟨🟨
🟪🟪🟪🟪
🟦🟦🟦🟦

Luckily blue was my outsider today!  

[Ruthio]

Needed a clue for the blue!

Connections
Puzzle #668
🟨🟨🟨🟨
🟩🟩🟦🟩
🟩🟩🟩🟦
🟩🟩🟩🟩
🟪🟪🟪🟪
🟦🟦🟦🟦

[klondike]

Needed a clue for the blue!

The spoiler made it easier  as I knew two and looked up the others...

[GrannyMac]

Connections
Puzzle #669
🟨🟨🟨🟨
🟩🟩🟩🟩
🟦🟦🟪🟦
🟦🟦🟦🟦
🟪🟪🟪🟪

Blue was a bit of a guess!

[dextrous63]

Connections
Puzzle #669
🟨🟪🟪🟨
🟨🟨🟨🟨
🟩🟩🟩🟩
🟦🟪🟦🟦
🟦🟪🟦🟦
🟦🟦🟦🟦
🟪🟪🟪🟪
Agree about blue.

[klondike]

Connections
Puzzle #669
🟨🟪🟪🟨
🟨🟨🟪🟨
🟨🟨🟨🟨
🟩🟩🟩🟩
🟦🟪🟪🟪
🟦🟪🟪🟦

 Wrong track initially on first group followed by wrong track entirely on third group.

[GrannyMac]

Connections
Puzzle #670
🟩🟩🟩🟩
🟨🟨🟨🟨
🟦🟦🟦🟦
🟪🟪🟪🟪

Purple was by default, but it makes sense. 

[GrannyMac]

Connections
Puzzle #671
🟨🟨🟨🟨
🟩🟩🟩🟩
🟦🟪🟪🟦
🟪🟪🟪🟦
🟦🟪🟪🟪
🟪🟪🟪🟪
🟦🟦🟦🟦

Nightmare blue & purple! No idea, lucky to fall on the right ones eventually.

[GrannyMac]

Connections
Puzzle #672
🟦🟪🟦🟦
🟩🟩🟩🟩
🟨🟨🟨🟨
🟦🟦🟦🟦
🟪🟪🟪🟪

[dextrous63]

Connections
Puzzle #672
🟦🟦🟦🟦
🟩🟩🟩🟩
🟨🟨🟨🟨
🟪🟪🟪🟪

No idea about one of the purple ones🤷🏻�♂️

[klondike]

Connections
Puzzle #672
🟨🟨🟨🟨
🟩🟩🟩🟩
🟦🟦🟦🟦
🟪🟪🟪🟪

Me neither. Not as in the answer definition anyway.

[GrannyMac]

Connections
Puzzle #673
🟨🟨🟨🟨
🟩🟩🟩🟩
🟦🟪🟪🟪
🟪🟪🟪🟪
🟦🟦🟦🟦

I had no idea about blue!  

[dextrous63]

Connections
Puzzle #673
🟨🟨🟨🟨
🟩🟩🟩🟩
🟦🟪🟦🟪
🟦🟪🟪🟦
🟦🟪🟦🟪
🟦🟪🟦🟪
Not in a month of Sundays would I have figured out blue and purple.

[klondike]

I'm stuck on those two right now and can't even make a start.

Started guessing and failed dismally...

Connections
Puzzle #673
🟨🟨🟨🟨
🟩🟩🟩🟩
🟦🟪🟪🟪
🟦🟦🟪🟪
🟪🟪🟦🟪
🟦🟪🟦🟪

Mauve obvious after the event and I'd even noticed part of it.