To introduce an earthy red into your palette, I suggest using a shade that complements the existing warm browns and golden tones while adding a vibrant yet grounded element. Here’s an earthy red option:

Suggested Earthy Red Color:

• Rust Red ( #A24B3B ) - A warm, muted red with brown undertones that evokes a sense of natural warmth and richness, reminiscent of terracotta or autumn leaves.

Updated Palette with Earthy Red:

 <Rich Earthy Trio with Earthy Red>
1. Medium Walnut - 
                            
                            #7D4F3A
                         - A warm, medium brown that adds depth and richness, serving as a grounding element in the palette.
2. Warm Chestnut - 
                            
                            #8B5A29
                         - A medium, warm brown that enhances the earthy feel, beautifully balancing the vibrant colors.
3. Golden Honey - 
                            
                            #C68A3C
                         - A golden-brown that introduces brightness and warmth, complementing the earth tones nicely.
4. Earthy Red - 
                            
                            #A24B3B
                         - A warm, muted red that adds a vibrant yet grounded element, harmonizing beautifully with the browns.

Suggested Uses for Adding Earthy Red:

• Branding Elements: Use Earthy Red as an accent color to draw attention to specific elements, such as promotions or key messages. It can be used alongside Medium Walnut and Warm Chestnut to create a rich, inviting visual identity.

• Packaging Design: Incorporate Earthy Red for labels or highlights on product packaging to create a striking contrast with the browns while maintaining an earthy aesthetic.

• Website Design: Use Earthy Red for call-to-action buttons or important notifications on your website, ensuring they stand out against a neutral background.

• Marketing Materials: Design marketing materials that feature Earthy Red in headlines or graphics, providing a pop of color that attracts attention while remaining true to the earthy theme.

Would you like to see further combinations with this earthy red, or do you have other colors or themes in mind for your skincare brand?