Orange is the new...........?

[Kind of Blue]

Although Dundee United have had the colour orange in their kit for ages, Blackpool's shirt colour is often considered unique in the Football/Premier League and yet there was a time in the 70s when three other Football League sides played in orange, or variants of that colour, shirts, - one of them even used their shirt colour in the name they gave their programme at the time, can you name the three?

I’m probably slow on the uptake and not understanding the question but I thought Luton did play in orange in the 70s?

Edit: ah, I understand your post later in the thread re Luton now! Apologies.