vikings two tone jerseys

I saw you updated the 89 Vikings purple jerseys. I think the team used a two-tone jerseys for a few years around 89

https://www.youtube.com/watch?v=xGGs-8i8QgQ the 88 team video go to 5.00 minute mark it appears the team had a two tone jersey that season as well

https://www.youtube.com/watch?v=5IoFVZ8hEW0

opening shots from video show the two tone jerseys in use in 87

https://www.youtube.com/watch?v=Zfi5GX-BJVM go to approx. 1 15 see a shot of the two tone purple jerseys in '88

I gave Bill a hand with this research the first time around. We looked for games at The Metrodome for consistent lighting. The outdoor games where they wore the purple jerseys (at Tampa Bay for instance) were difficult to judge.

Minnesota vs Detroit 9/13/87


Minnesota vs Denver 10/26/87


Minnesota vs Chicago 12/6/87


Minnesota vs Philadelphia 9/25/88


Minnesota vs Los Angeles Rams

thanks
I agree it is harder to tell inside the dome, it is more event in outdoor games such as approx. 12 seconds into 1987 team video ( NFC champ game at Wash) and 88 clip at Dolphins. FWIW I can see the two tones in most of the pictures you provided.

I think this is the photo that started it off...

yeah it probably was.
The walker trade and the 40-60 patch easily dates all 1989 photos of Vikings jerseys