Grid Border Custom Color CSS

I’m attempting to make a style that sets custom colors on all 4 borders of a grid. However, for some reason the top border of the grid will not change to the custom color and is instead staying solid black. Attached are an example image of an empty grid with the style set, and the css code for the style. Is there something I’m missing?
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Hey Alistair,

If you inspect the DOM you should be able to tell what’s overriding your style.

You seem to have a typo in your CSS. The top border has nisp while the others have nsip.