For a stroke around the inventory slots, I recommend using Deep Blue ( #1A237E ). This color will add a touch of sophistication and a bit of contrast against the Charcoal Gray slot color without overpowering the overall dark theme.

Here’s how it would look:

• Stroke Color: Deep Blue ( #1A237E ) - This color can provide a subtle highlight that defines the slots while maintaining the elegance of the dark theme.

Would you like suggestions for hover effects or animations for the slots and buttons in your inventory UI?