Help with Led Matrix 8x276

I am new here and with WLED.
I want form my home cinema 8 Led Strips witch du the Matrix effect.
So i Make a led matrix with 8 x 255 and the matrix effect.
Everting worked fine.
But now each strip has more than 255 LEDs (276). In total 2208 LEDs. And this is not possible in the stepup of the matrix, In total 2208 LEDs

  • Is it possibele to increase the value?
  • And changing the color from green to blue.

regards JJ