# #21f263

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

## Values

- Hex: `#21f263`
- RGB: rgb(33, 242, 99)
- HSL: hsl(139, 89%, 54%)
- OKLCH: oklch(0.84 0.24 147.4)
- Relative luminance: 0.6473
- Nearest named color: springgreen (#00ff7f, Δ 3.826) — https://brandsweets.com/colors/springgreen
- Moods: vivid
- Page: https://brandsweets.com/colors/21f263

## Tints & shades

- Tints (toward white): #35f371, #4df582, #60f68f, #78f7a0, #8bf8ae, #9ff9bb, #b7fbcc, #cafcda, #e2fdeb, #f5fef8
- Shades (toward black): #0eec54, #0cd44c, #0bbc43, #0aa43a, #088c32, #077429, #055c21, #044318, #032b0f, #011307

## Harmonies

- Complementary: #f221b0
- Analogous: #48f221, #21f2cc
- Triadic: #6321f2, #f26321
- Split-complementary: #cc21f2, #f22148
- Tetradic: #2148f2, #f221b0, #f2cc21

## Colors that go with #21f263

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

- **Violet** #ee82ee [harmony: complementary] — Violet sits directly opposite #21f263 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/violet
- **Deep Sky Blue** #00bfff [pool] — Designers have shipped Deep Sky Blue with #21f263: 3 real palettes, including Remix's brand system and Prime Video's brand system, as the lead colour. Seen in: Remix (https://brandsweets.com/colors/brands/remix-run), Prime Video (https://brandsweets.com/colors/brands/primevideo-com), Learning App (https://brandsweets.com/palettes/playful#learning-app). — https://brandsweets.com/colors/deepskyblue
- **Hot Pink** #ff69b4 [harmony: split] — Hot Pink is a split-complement of #21f263: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. — https://brandsweets.com/colors/hotpink
- **Plum** #dda0dd [harmony: split] — Plum is a split-complement of #21f263: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. — https://brandsweets.com/colors/plum
- **Charcoal** #36454f [role] — Charcoal is the body-text near-black for #21f263: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy. — https://brandsweets.com/colors/charcoal
- **Red** #ff0000 [pool] — Red is paired with #21f263 in two real palettes: Gatorade's brand system and Wise's brand system, as the supporting colour. Seen in: Gatorade (https://brandsweets.com/colors/brands/gatorade-com), Wise (https://brandsweets.com/colors/brands/wise-com). — https://brandsweets.com/colors/red
- **Royal Blue** #4169e1 [pool] — Royal Blue is paired with #21f263 in two real palettes: MongoDB's brand system and Brilliant's brand system, as the supporting colour. Seen in: MongoDB (https://brandsweets.com/colors/brands/mongodb-com), Brilliant (https://brandsweets.com/colors/brands/brilliant-org). — https://brandsweets.com/colors/royalblue
- **Taupe** #483c32 [pool] — Taupe is paired with #21f263 in two real palettes: 7-Eleven's brand system and WhatsApp's brand system, as the lead colour. Seen in: 7-Eleven (https://brandsweets.com/colors/brands/7-eleven-com), WhatsApp (https://brandsweets.com/colors/brands/whatsapp-com). — https://brandsweets.com/colors/taupe

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

- On white (#ffffff): 1.51:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #088730 (4.65:1); AA: background → #595959 (4.65:1); AAA: text → #066524 (7.25:1); AAA: background → #3d3d3d (7.21:1)
- On black (#000000): 13.95:1 — AA pass, AA-large pass, AAA pass

## Brands using this color

- **MongoDB** — primary #00ed64 (Δ 1.556) — https://brandsweets.com/colors/brands/mongodb-com

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/21f263-a2beae-c059d4-1f2d2a-ebf1e9?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: "#21f263" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.