# #1fef99

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

## Values

- Hex: `#1fef99`
- RGB: rgb(31, 239, 153)
- HSL: hsl(155, 87%, 53%)
- OKLCH: oklch(0.841 0.192 158)
- Relative luminance: 0.6432
- Nearest named color: Hyperpop Green (#17f9a6, Δ 2.785) — https://brandsweets.com/colors/hyperpop-green
- Moods: vivid
- Page: https://brandsweets.com/colors/1fef99

## Tints & shades

- Tints (toward white): #37f1a3, #4af2ac, #62f4b7, #75f5c0, #8df7cb, #a0f8d3, #b7fade, #cbfbe7, #e2fdf2, #f5fefb
- Shades (toward black): #10e58c, #0ecd7e, #0db56f, #0b9d60, #0a8a55, #087246, #065b37, #054329, #032b1a, #01130c

## Harmonies

- Complementary: #ef1f76
- Analogous: #1fef30, #1fdeef
- Triadic: #991fef, #ef991f
- Split-complementary: #ef1fde, #ef301f
- Tetradic: #301fef, #ef1f76, #deef1f

## Colors that go with #1fef99

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

- **Taupe** #483c32 [pool] — Taupe is paired with #1fef99 in 4 real palettes, including 7-Eleven's brand system and Astro's brand system, as the lead colour. Seen in: 7-Eleven (https://brandsweets.com/colors/brands/7-eleven-com), Astro (https://brandsweets.com/colors/brands/astro-build), WhatsApp (https://brandsweets.com/colors/brands/whatsapp-com), Chime (https://brandsweets.com/colors/brands/chime-com). — https://brandsweets.com/colors/taupe
- **Violet** #ee82ee [harmony: complementary] — Violet sits directly opposite #1fef99 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
- **Charcoal** #36454f [role, pool] — Charcoal is the text near-black for #1fef99: softer than #000 and cool enough to feel like part of the same palette. Seen in: Docker (https://brandsweets.com/colors/brands/docker-com), Canopy (https://brandsweets.com/palettes/cool#canopy). — https://brandsweets.com/colors/charcoal
- **Deep Sky Blue** #00bfff [pool] — Designers have shipped Deep Sky Blue with #1fef99: 3 real palettes, including Prime Video's brand system and Remix's brand system, as the supporting colour. Seen in: Prime Video (https://brandsweets.com/colors/brands/primevideo-com), Remix (https://brandsweets.com/colors/brands/remix-run), Astro (https://brandsweets.com/colors/brands/astro-build). — https://brandsweets.com/colors/deepskyblue
- **Royal Blue** #4169e1 [pool] — Royal Blue is paired with #1fef99 in 3 real palettes, including MongoDB's brand system and Docker's brand system, as the supporting colour. Seen in: MongoDB (https://brandsweets.com/colors/brands/mongodb-com), Docker (https://brandsweets.com/colors/brands/docker-com), Brilliant (https://brandsweets.com/colors/brands/brilliant-org). — https://brandsweets.com/colors/royalblue
- **Light Coral** #f08080 [harmony: split] — Light Coral is a split-complement of #1fef99: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. — https://brandsweets.com/colors/lightcoral
- **Yellow Green** #9acd32 [harmony, pool: analogous] — Yellow Green is #1fef99's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Monster Energy (https://brandsweets.com/colors/brands/monsterenergy-com). — https://brandsweets.com/colors/yellowgreen
- **Crimson** #dc143c [pool] — Crimson is paired with #1fef99 in two real palettes: Formula 1's brand system and Wise's brand system, as the supporting colour. Seen in: Formula 1 (https://brandsweets.com/colors/brands/formula1-com), Wise (https://brandsweets.com/colors/brands/wise-com). — https://brandsweets.com/colors/crimson

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

- On white (#ffffff): 1.51:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #098652 (4.62:1); AA: background → #595959 (4.62:1); AAA: text → #07643d (7.24:1); AAA: background → #3d3d3d (7.17:1)
- On black (#000000): 13.86:1 — AA pass, AA-large pass, AAA pass

## Brands using this color

- **Prime Video** — accent #37f1a3 (Δ 1.559) — https://brandsweets.com/colors/brands/primevideo-com

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/1fef99-a2beb6-d459c8-1f2d2d-e9f1ea?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: "#1fef99" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.