Letters are difficult to write with a mouse <_>
Filled Brindle effects any type of brindle. It just means the brindle as a second color filling inside the stripes. The color can be lighter or darker.
-Brindle are stripes darker than the base that run vertically along the body.
-Reverse Brindle are stripes lighter than the base that run vertically along the body.
-Horizontal Brindle are stripes that are darker than the base that run horizontally along the body.
-Reverse Horizontal Brindle are stripes that are lighter than the base that run horizontally along the body.
All brindle types can show up with only a little bit of striping, or striping that covers the whole body, and anything in-between.