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A reddish-brown (often labelled “red brown” #A52A2A, “mahogany” #C04000 or “russet” #80461B) is a warm, earthy hue created by dominant red light (≈60-75 %), moderate green (15-40 %) and very little blue (0-20 %), positioned between red and brown on the color wheel and widely used to evoke natural wood, leather and rust tones [1][2].
Position in colour space
• RGB archetype “Red-Brown” (#A52A2A) → RGB (165, 42, 42), HSL 0°, 59 %, 41 %, CIELAB ≈ L 41, a 37, b 21 [1].
• “Mahogany” (#C04000) is lighter and more orange-leaning (CIELAB L 47, a 46, b 47) [2].
• “Burnt Umber” (#551C01) adds black, lowering lightness (L* 19) and saturation [3].
Creating the shade
• Pigments: start with iron-oxide red (Fe₂O₃) and temper with carbon black or yellow ochre; artists traditionally “burn” umber clay to shift raw umber (olive) into burnt umber (reddish-brown) [3].
• Digital: keep Red channel high, add 25-45 % Green, restrict Blue <20 %; in CMYK use high M+Y (~75 % each) with 35-50 % K [1].
Physical & cultural references
• Woods: mahogany, chestnut, and teak heartwood naturally average 600–650 nm dominant wavelength, visually perceived as reddish-brown [4].
• Rust: hydrated ferric oxide forms a* positive values >30 in CIELAB, giving the classic reddish-brown patina on iron [5].
• Fashion: WGSN’s A/W 2023 report shows “warm earth browns” rose 27 % on runways YoY, credited to demand for “heritage comfort tones” [6].
• Branding: Pantone 469 C (similar to russet) is recommended for “organic” or “craft” packaging; its ΔE < 2 with sRGB #7F462C ensures cross-media consistency [7].
Common named shades (selection)
| Name | Hex | Notable use cases | Source |
|---|---|---|---|
| Red Brown | #A52A2A | Web safe, CSS keyword “brown”, leather UI accents | [1] |
| Mahogany | #C04000 | Luxury furniture, musical instruments | [2] |
| Russet | #80461B | Autumn apparel, agricultural branding | [2] |
| Chestnut | #954535 | Hair dye, cosmetic palettes | [2] |
| Burnt Umber | #551C01 | Fine-art shadows, underpainting | [3] |
“Warm browns with red undertones signal ‘comfort, stability and tradition’—qualities consumers seek post-pandemic,” observes Pantone Color Institute’s executive director Leatrice Eiseman [7]. Google Trends shows the term “mahogany paint” gaining 42 % search volume between 2021-2023 in North America [8].
Design & digital media
Paint & print
• Many historical red-brown pigments (e.g., red lead, cadmium) are toxic; modern equivalents use synthetic iron oxides (EU REACH Annex XIV compliant).
• For heritage conservation, match CIELAB within ΔE ≤ 3 to satisfy ISO 11 664 archival colour accuracy.
• Predictive models linking perceived warmth of reddish-browns to emotional response in virtual reality environments.
• Sustainable bio-based pigments (lignin-derived) to replace metal oxides while retaining colourfastness.
• Reddish-brown is a red-biased brown—e.g., #A52A2A—achieved by high red, moderate green, low blue.
• Key physical analogues: mahogany wood, rust, burnt umber pigment.
• Usage is trending up (+27 % on fashion runways) as a “comfort” tone.
• Ensure contrast compliance and use non-toxic iron-oxide pigments for safety.
• Ongoing R&D explores eco-friendly pigments and VR colour-emotion mapping.
Sources
[1] HTMLColorCodes – Red Brown (#A52A2A), 2023.
[2] Wikipedia – Mahogany, Russet, Chestnut colours, 2024.
[3] Wikipedia – Burnt Umber, 2024.
[4] Forest Products Laboratory – Wood Handbook, Ch. 3 Colorimetry of Hardwoods, 2022.
[5] ASM Handbook Vol. 13B – Corrosion: Fundamentals, Testing, and Protection, 2019.
[6] WGSN Insight – AW23 Colour Forecast, Oct 2023.
[7] Pantone Color Institute press release, “The Return of Earth Browns”, Jan 2024.
[8] Google Trends dataset export, search term “mahogany paint”, 2021-2023.
[9] ASTM D4587 UV Exposure of Paint, 2022 results summary.
User question
Where can I buy this colour in leather for car seats?
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