Named colors beginning with B come from many places — CSS/W3C named colors, brand and paint palettes, Pantone and RAL naming, traditional Japanese, Indian and European color vocabularies, and community color-survey names such as the xkcd survey, alongside other widely-circulated public color databases. Where a primary source defines an official value, the entry says so; other hex values are best read as common digital approximations. This page lists a curated, deduplicated selection, including the eight CSS-named B-colors: Beige, Bisque, Black, Blanched Almond, Blue, BlueViolet, Brown, and Burlywood. Of those eight, only Black and Blue belong to the original sixteen basic HTML colors (the rest were inherited later from the extended X11/SVG color-name list).

A few claim the title. Black is the most universal — pure RGB(0,0,0), the original keyword color, used since cave painting. Blue is the world's favorite color in nearly every survey. Burgundy and Bordeaux are the most-recognized wine-derived color names. And Bondi Blue is one of the most recognizable product-design colors of the late 1990s, having helped transform personal-computer design with the 1998 Apple iMac G3.

Bondi Blue is named after the color of the water at Bondi Beach in Sydney, Australia — a vivid cyan-leaning teal. Apple's industrial design team, led by Jonathan Ive, used it for the original iMac G3, launched in August 1998 — the landmark translucent personal computer that popularized see-through consumer-computer styling (earlier translucent hardware, such as Apple's own eMate 300, predated it). The iMac was an immediate hit (around 800,000 units in its first 20 weeks) and is widely credited with reviving Apple's fortunes and ending the beige-box era of personal computing; Apple announced its five-millionth iMac on April 19, 2001, with cumulative sales reaching roughly six million by the end of 2001. Bondi Blue became cultural shorthand for the late-1990s tech aesthetic.

Both are named for French wine regions and both describe deep wine-reds. Burgundy takes its name from the Bourgogne region (Pinot Noir country), and a commonly-cited digital value is #800020. Bordeaux takes its name from the Bordeaux region (Cabernet/Merlot country), and is commonly given around #7B002C. On this page, Burgundy is treated as slightly red-purple and Bordeaux as a darker, slightly cooler blue-red — but be aware that in commercial fashion and paint contexts the two names are often used interchangeably, and different houses swap which one they treat as warmer or cooler.

Three earth-and-soot pigments that defined European drawing and painting for centuries. Bistre is a transparent yellow-brown made from beechwood soot, dissolved in water — widely associated with Old Master wash drawings, including those of Rembrandt (modern pigment analysis suggests many of his brown inks were also iron gall, so attributions vary work-by-work). Burnt Sienna is the heated form of raw sienna, a clay-based iron-oxide earth pigment quarried near Siena, Italy; the calcination ("burning") drives off water and deepens the yellow-brown to a rich red-brown. Burnt Umber is the heated form of raw umber, an iron-and-manganese earth pigment from Umbria, Italy; the result is a deep chocolate-brown widely used in European painting for shadows, ground tones, and underpainting from the Renaissance onward. All three remain available as modern pigments.

For CSS-named colors (Beige, Bisque, Black, Blanched Almond, Blue, BlueViolet, Brown, Burlywood), yes — the W3C specification fixes the exact sRGB values. For Pantone, RAL, and Crayola, hex values are approximate conversions from those brands' proprietary swatch books, which are defined under specific lighting conditions. Different sources occasionally disagree by a few digits; this page uses the most widely-cited public values. For brand and team colors (Bondi Blue, Barbie Pink, Brandeis Blue, Boston University Red), the authoritative reference is the brand's own guidelines.