Adding borders to GridPane JavaFX

Question

I am creating a board game in JavaFX using GridPane.

There are 7 different animations which could be placed in each grid (cell) of the grid.

Initially the gr

Answer 1

Simply add an H and V gap of one pixel width and let the grid pane's background color "shine" through:

.my-grid-pane {
    -fx-background-color: lightgray;
    -fx-vgap: 1;
    -fx-hgap: 1;
    -fx-padding: 1;
}

If the grid pane's background color spreads from outside more than one pixel (will happen if its parent is larger than itself), just wrap the grid in a Group!