Decide what should lead
In this evening edit, the burgundy colour, draped fabric and long silhouette are already doing a lot. The neckline and slit make the shape more pronounced. Adding several equally dramatic accessories would create a different mood; keeping them restrained leaves attention on the dress.
This is one way to approach occasion dressing, not a universal rule. If you enjoy layered jewellery or a stronger shoe, choose which detail matters most to you and build the rest around it.
One statement dress + one restrained metallic accent + a shoe that supports the silhouette. Let the colour and fabric remain easy to see.
Use jewellery to frame the look
Small gold earrings add warmth beside burgundy without filling the neckline. A larger earring could work as an alternative, particularly if other accessories stay simple. Consider where each piece sits relative to the neckline and hair rather than judging it in isolation.
Think about proportion and movement
A long hem changes how much of the shoe is visible. A slit brings attention to movement, so consider the look while walking and sitting as well as standing. For a real outfit, check coverage, comfort and the occasion's dress code yourself; an image cannot establish how a garment will fit.
If the neckline or slit is more dramatic than you prefer, keep the colour idea and change the cut. A burgundy midi dress, a higher neckline or a flowing trouser combination can carry the same rich palette.
Keep the palette intentional
A tonal bag lets the outfit read as one colour story. A darker neutral bag creates a clearer break. You do not need to add another strong colour just because the dress is simple to accessorise.
The question is which version feels right for the setting and for you. Use this edit as a visual reference, then choose a practical version from the pieces you actually want to wear.