Pairing brown mascara with red lipstick can create a stunning and classic look. Here's how to do it:

1. **Skin Preparation**: Start by cleansing, toning, and moisturizing your skin. This will ensure a smooth canvas for your makeup application.

2. **Foundation and Concealer**: Apply a foundation that matches your skin tone. Use a concealer to hide any blemishes or dark circles. Blend well to avoid any harsh lines.

3. **Eye Makeup**: Apply a neutral eyeshadow to your eyelids. This will help to enhance the brown mascara. You can opt for shades of beige, peach, or light brown.

4. **Mascara**: Now, apply the brown mascara. Brown mascara tends to give a softer look compared to black. It is perfect for a daytime look or for those who prefer a more natural appearance. Apply two coats to add volume and length to your lashes.

5. **Blush**: Apply a soft peach or pink blush to the apples of your cheeks. This will give a healthy flush to your skin and complement the brown mascara and red lipstick.

6. **Red Lipstick**: Choose a red lipstick that suits your skin tone. If you have cool undertones, go for a red with blue undertones. If you have warm undertones, choose a red with orange undertones. Apply the lipstick carefully and blot with a tissue to avoid any smudging.

7. **Final Touches**: To finish off the look, you can apply a light dusting of translucent powder to set your makeup.

Remember, the key to pairing brown mascara with red lipstick is to keep the rest of your makeup subtle, allowing the mascara and lipstick to be the stars of your look.