I have used George Catlin's painting swhich show Comanche teepees a light brown, but other sources show more as whitish. So I asked GROK:
Yes—buffalo (bison) hides were the primary traditional covering for Plains Indian tipis (also spelled teepees or lodges), and properly tanned ones were typically a light creamy white to off-white, which is why so many historical paintings and descriptions show them that way. Black-and-white photos of later camps often show similar light tones because canvas largely replaced hides by the late 19th century and also tended to be light-colored.
A typical family-sized tipi (roughly 15–18 feet in diameter) required about 12–20 cow hides (bull hides were heavier and used more for other purposes), scraped thin, brain-tanned (or with related methods involving brains, fat/grease, marrow, etc.), and sewn together with sinew into a large semicircle. The thinning was intentional: it reduced weight for transport, improved flexibility, and let more light through. Women did most of this laborious work. The resulting soft leather was classically described as a "beautiful creamy white."
Why the light color, and sources of variation
Brain-tanning (a form of oil/fat liquoring rather than vegetable tanning) produces pale, light-buff to creamy results when the hair is fully removed and the hide is worked thoroughly. Smoking the finished hide (common for waterproofing and preservation) could shift it toward golden, amber, or light brown tones. Over time, exposure to weather, campfire smoke inside the lodge, dirt, and wear naturally darkened or stained covers. New or carefully maintained ones stayed lighter. Rawhide elements (for ropes, some reinforcements) were also light/white when prepared that way.
Not every tipi was identical in shade even within one camp:
• Quality and thoroughness of scraping/tanning varied.
• Some hides were smoked more heavily.
• Age and use created a range from nearly white/creamy to light tan or weathered grayish-brown.
• A minority of tipis were elaborately painted (geometric designs, animals, celestial motifs, war/vision records, tribal or personal symbols). Painting was more common among groups like the Blackfeet/Blackfoot, Kiowa, and some others; most everyday lodges were plain or lightly decorated. Designs used earth pigments (reds, yellows, blacks, greens, etc.). The base fabric color still showed through or around the paint.
By the 1880s, as bison herds collapsed, canvas rapidly replaced hides. Canvas covers were lighter, easier to sew and maintain, and commonly white, off-white, or light natural tones (sometimes bleaching further in the sun). This reinforces the "white tipi" visual in later photos and many paintings. Modern reproductions and commercial tipis often use light canvas for the same practical and traditional reasons (better light transmission inside; dark colors make the interior gloomy).
Practical notes for your miniature village
• Base accuracy: Lean toward creamy white, ivory, off-white, or very light tan/beige for the majority of lodges. This respects the historical "properly tanned hide" appearance and the later canvas look. Uniformity within a single camp or related group is reasonable (same tanners, same materials, shared maintenance practices).
• Variety without breaking accuracy:
o Slight differences in shade (fresher creamy white vs. slightly yellowed, smoked golden, or weathered light brownish).
o A few more heavily painted ones (bottom earth-band in dark red/brown is a common motif; upper zones with animals, geometric patterns, or vision imagery).
o Occasional smoke-darkened or stained areas near the top or base.
o Different sizes, slight variations in pole projection or overall silhouette (tribal styles differed a bit—e.g., Crow poles tended to be longer).
• Avoid solid dark browns, greens, blues, etc., as primary cover colors—these are modern and non-traditional for historical Plains tipis. Painted decoration on a light base is the accurate way to add color and individuality.
Sources do vary because they mix periods (hide vs. canvas eras), tribal differences, artistic license in paintings, and the fact that few original hide covers survive (they wore out in a couple of years). But the consistent through-line from early accounts, ethnographies, and experts (including the classic Laubin work) is light-colored tanned hides as the ideal and common appearance. Your observation of many "white" ones in art and photos lines up well with that.