RGB or maybe GBR, we had to replace the RGB as the one we got had different pinout to what was initially designed in.
But after small rework, very first test design with vivado, with pure block design and no use of ARM cores, just worked.
The LEDs are with full brightness, no PWM.
Very stupid design but it does at least check all LEDs are working. Does now work out of flash too, the FPGA is loaded by ARM cores from SPI flash that is mounted as normal linear Flash. The ARM Cores can execute also directly from SPI Flash...