For a candlelight dinner between couples, you can choose candles of different colors to create a romantic atmosphere. Common colors include red, pink, white, yellow, etc. These colors can give people a warm and sweet feeling. In addition, you can choose scented or unscented candles according to your personal preference.

In addition to candles, you also need to prepare some other things, such as:

1. Tableware and tablecloths: In order to make the dinner more elegant, you can choose exquisite tableware and tablecloths.

2. Flowers and music: Flowers can increase the sense of romance, and music can create a more comfortable atmosphere.

3. Food and drinks: Choose delicious food and drinks according to personal taste, such as steak, pasta, fruit, red wine, etc.

4. Candlelight panels: Candlelight panels can illuminate the entire room, making candlelight dinners more romantic.

In short, in order to prepare a perfect candlelight dinner, it takes some thought and time to prepare. Most importantly, let the other person feel your love and care.