# #b5c601

A color — vivid. Deterministic analysis from BrandSweets (no inference).

## Values

- Hex: `#b5c601`
- RGB: rgb(181, 198, 1)
- HSL: hsl(65, 99%, 39%)
- OKLCH: oklch(0.786 0.179 115.8)
- Relative luminance: 0.5021
- Nearest named color: yellowgreen (#9acd32, Δ 3.451) — https://brandsweets.com/colors/yellowgreen
- Moods: vivid
- Page: https://brandsweets.com/colors/b5c601

## Tints & shades

- Tints (toward white): #d1e401, #e9fe06, #ecfe25, #eefe43, #f1fe62, #f3fe7b, #f6fe9a, #f9ffb8, #fbffd6, #fefff5
- Shades (toward black): #a8b701, #95a201, #879301, #747f01, #667001, #545b00, #464c00, #333800, #252900, #131400

## Harmonies

- Complementary: #1101c6
- Analogous: #c67401, #53c601
- Triadic: #01b5c6, #c601b5
- Split-complementary: #0153c6, #7401c6
- Tetradic: #01c674, #1101c6, #c60153

## Colors that go with #b5c601

Named partners (harmony on the OKLCH wheel, co-occurrence in curated palettes and brand systems, and the neutrals that carry it), best first:

- **Cornflower Blue** #6495ed [harmony, pool: split] — Cornflower Blue is a split-complement of #b5c601: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Ahrefs (https://brandsweets.com/colors/brands/ahrefs-com), Blueprint (https://brandsweets.com/palettes/technical#blueprint), NBA (https://brandsweets.com/colors/brands/nba-com), Mastodon hosted on mastodon.social (https://brandsweets.com/colors/brands/mastodon-social). — https://brandsweets.com/colors/cornflowerblue
- **Deep Sky Blue** #00bfff [harmony, pool: triadic] — Deep Sky Blue completes a triad with #b5c601 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Learning App (https://brandsweets.com/palettes/playful#learning-app), Salesforce (https://brandsweets.com/colors/brands/salesforce-com), Blueprint (https://brandsweets.com/palettes/technical#blueprint), Prime Video (https://brandsweets.com/colors/brands/primevideo-com). — https://brandsweets.com/colors/deepskyblue
- **Crimson** #dc143c [pool] — Crimson is paired with #b5c601 in 7 real palettes, including Wise's brand system and Tabloid, as the accent. Seen in: Wise (https://brandsweets.com/colors/brands/wise-com), Tabloid (https://brandsweets.com/palettes/editorial#tabloid), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com), Diner (https://brandsweets.com/palettes/vivid#diner). — https://brandsweets.com/colors/crimson
- **Denim** #1560bd [pool] — Designers have shipped Denim with #b5c601: 6 real palettes, including Wikipedia's brand system and Walmart's brand system, as the supporting colour. Seen in: Wikipedia (https://brandsweets.com/colors/brands/wikipedia-org), Walmart (https://brandsweets.com/colors/brands/walmart-com), Open House (https://brandsweets.com/palettes/clean#open-house), Warner Bros. (https://brandsweets.com/colors/brands/warnerbros-com). — https://brandsweets.com/colors/denim
- **Red** #ff0000 [pool] — Red is paired with #b5c601 in 5 real palettes, including Wired's brand system and Wise's brand system, as the supporting colour. Seen in: Wired (https://brandsweets.com/colors/brands/wired-com), Wise (https://brandsweets.com/colors/brands/wise-com), Gatorade (https://brandsweets.com/colors/brands/gatorade-com), Paddle (https://brandsweets.com/colors/brands/paddle-com). — https://brandsweets.com/colors/red
- **Royal Blue** #4169e1 [pool] — Royal Blue is paired with #b5c601 in 4 real palettes, including Disney's brand system and Walmart's brand system, as the lead colour. Seen in: Disney (https://brandsweets.com/colors/brands/disney-com), Walmart (https://brandsweets.com/colors/brands/walmart-com), NBA (https://brandsweets.com/colors/brands/nba-com), Brilliant (https://brandsweets.com/colors/brands/brilliant-org). — https://brandsweets.com/colors/royalblue
- **Plum** #dda0dd [harmony: complementary] — Plum sits directly opposite #b5c601 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. — https://brandsweets.com/colors/plum
- **Charcoal** #36454f [role, pool] — Charcoal is the body-text near-black for #b5c601: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy. Seen in: Disney (https://brandsweets.com/colors/brands/disney-com), Coastal (https://brandsweets.com/palettes/cool#coastal). — https://brandsweets.com/colors/charcoal

## Contrast (WCAG 2.x, as text)

- On white (#ffffff): 1.9:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #707a01 (4.69:1); AA: background → #4a4a4a (4.66:1); AAA: text → #545b00 (7.31:1); AAA: background → #2e2e2e (7.14:1)
- On black (#000000): 11.04:1 — AA pass, AA-large pass, AAA pass

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/b5c601-b8bea2-4e88df-262d1f-f1eee9?lock=0&style=vibrant
(Humans lock/regenerate in the tool; the URL is the state — read `lock=` back to see what they kept.)

## Connect an agent

Point any MCP client at the BrandSweets colors endpoint for the same engine:

- Endpoint: https://mcp.brandsweets.com/colors/mcp
- Tools: `analyze_color` (e.g. `analyze_color({ color: "#b5c601" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.