Color accuracy from my capture device

Hello everybody!

I need your precious ideias to help me solve a problem I'm having with my current setup.
Basically, I notice a huge difference between the colors obtained by the capture card and those sent to the TV.

I've attached 3 test images displayed on the TV (red, green and blue) and their respective images displayed on the Hyperion Web Configurator - Led Visualization - (brown, light green and slate purple)

Does anyone know what might be causing this issue?

I could change to a different Video Capture Card like the following:
But first, I would prefer to try an solve this with my current setup:

Software
- HyperBian 5.4.72-v7+ with Hyperion Ambilight Deamon Version: 2.0.0-alpha.9

Hardware
- Raspberry Pi 3 Model B+
- HDMI Splitter:
- LogiLink USB 2.0 Video Adapter:
- HDMI to RCA:

I'm using the Android Minix Neo T5: http://minix.com.hk/products/neo-t5

That might in fact be the issue! I tried 2 other sources (tv box, laptop) and the color was accurate.
The problem now is trying to find a way to disable HDR on my TV, while connected to the Android Box...
It's not letting me disable it, but that's not directly related with the Hyperion Software.
Thank you for your help.