How to make this layer or portion red?

Hello,

I am trying to print an A1 toolbox, and want this portion red. I painted that area red, however because the way it lays that layer down during extrusion, I’m getting a messy blob. I tried to just change that layer to red, but that didn’t really work either. Not sure what to do. Any ideas?

Here is how it looks on slicer when I ‘paint’ the color. I tried to change direction of bridge, but that doesnt work. I then tried to only color that layer (in mm) which didn’t work either. I left the other ones black so you can see that they bridge across. but bridging that way with no support under just isn’t going to work. I just need it to go the same way black does?