100% color bars wrong through miniconverters

When running my video switch through mini converters my 100% color bar test pattern does not pass the color yellow or cyan properly, photo below with and without. 75% color bar test pattern works fine. My converters are up to date. My signal flow is Barco DCS-100 output > DVI to HDMI cable > MiniConverter HDMI to SDI 4K > 6G-SDI cable > MiniConverter SDI to HDMI 4K > HDMI cable > Any display HDMI input.

Any advice or thoughts would be much appreciated by me!

with.png (654.66 KiB) Viewed 793 times

withoutconverters.png (551.61 KiB) Viewed 793 times

Is your HzdMI cable a new wide bandwidth cable, or an older one, which could be part of the problem, adding a co,or shift on some colors?
Cheers

Is yiur HzdMI cable a new wide bandwidth cable, or an older one, which could be part of the problem, adding a co,or shift on some colors?
Cheers

Yep all monoprice high speed hdmi, i've tried a few other brands too. 6G-HDSDI is Belden 1694A cable at 100 feet.

Hmm, maybe a REC.2020 vs REC.709 color space issue?

The Barco is RGB output by DVI. The monitor will pick it up as RGB and handle acordingly.

The miniconverter seems to pick YUV and there is your color problem.. Check if you can switch to YUV mode in the Barco. Or maybe a setting in the miniconverter to force it in RGB mode?