# #665fe7

A color — cool, vivid, technical, modern. Deterministic analysis from BrandSweets (no inference).

## Values

- Hex: `#665fe7`
- RGB: rgb(102, 95, 231)
- HSL: hsl(243, 74%, 64%)
- OKLCH: oklch(0.568 0.199 280.3)
- Relative luminance: 0.1678
- Nearest named color: Arcane Brew (#5260e1, Δ 2.873) — https://brandsweets.com/colors/arcane-brew
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/665fe7

## Tints & shades

- Tints (toward white): #736de9, #847eec, #918cee, #a29df0, #aeabf2, #bbb8f4, #cccaf7, #d9d7f9, #eae9fc, #f7f6fe
- Shades (toward black): #4d45e3, #332adf, #271ecc, #221bb1, #1d1797, #18137c, #130f62, #0e0b47, #09072c, #030312

## Harmonies

- Complementary: #e0e75f
- Analogous: #5f9ce7, #aa5fe7
- Triadic: #e7665f, #5fe766
- Split-complementary: #e7aa5f, #9ce75f
- Tetradic: #e75f9c, #e0e75f, #5fe7aa

## Colors that go with #665fe7

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

- **Charcoal** #36454f [role, pool] — Charcoal is the text near-black for #665fe7: softer than #000 and cool enough to feel like part of the same palette. Seen in: Docker (https://brandsweets.com/colors/brands/docker-com), Hinge (https://brandsweets.com/colors/brands/hinge-co), Jack Daniel's (https://brandsweets.com/colors/brands/jackdaniels-com), Starlink (https://brandsweets.com/colors/brands/starlink-com). — https://brandsweets.com/colors/charcoal
- **Sea Green** #2e8b57 [harmony, pool: triadic] — Sea Green completes a triad with #665fe7 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Subaru (https://brandsweets.com/colors/brands/subaru-com), Jack Daniel's (https://brandsweets.com/colors/brands/jackdaniels-com), Netflix (https://brandsweets.com/colors/brands/netflix), Paramount+ (https://brandsweets.com/colors/brands/paramountplus-com). — https://brandsweets.com/colors/seagreen
- **Amber** #ffbf00 [pool] — Amber is paired with #665fe7 in 7 real palettes, including Mastodon hosted on mastodon.social's brand system and Wikipedia's brand system, as the accent. Seen in: Mastodon hosted on mastodon.social (https://brandsweets.com/colors/brands/mastodon-social), Wikipedia (https://brandsweets.com/colors/brands/wikipedia-org), Walmart (https://brandsweets.com/colors/brands/walmart-com), NBA (https://brandsweets.com/colors/brands/nba-com). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 12 real palettes, including Signal's brand system and EA's brand system put Blue beside #665fe7, as the supporting colour. Seen in: Signal (https://brandsweets.com/colors/brands/signal-org), EA (https://brandsweets.com/colors/brands/ea-com), BBC (https://brandsweets.com/colors/brands/bbc-com), MongoDB (https://brandsweets.com/colors/brands/mongodb-com). — https://brandsweets.com/colors/blue
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #665fe7: 9 real palettes, including Behance's brand system and Carrefour's brand system, as the supporting colour. Seen in: Behance (https://brandsweets.com/colors/brands/behance-net), Carrefour (https://brandsweets.com/colors/brands/carrefour-com), Nokia (https://brandsweets.com/colors/brands/nokia-com), Nivea (https://brandsweets.com/colors/brands/nivea-com). — https://brandsweets.com/colors/cobalt
- **Cornflower Blue** #6495ed [pool] — Designers have shipped Cornflower Blue with #665fe7: 6 real palettes, including Mastodon hosted on mastodon.social's brand system and Roblox's brand system, as the supporting colour. Seen in: Mastodon hosted on mastodon.social (https://brandsweets.com/colors/brands/mastodon-social), Roblox (https://brandsweets.com/colors/brands/roblox-com), Webflow (https://brandsweets.com/colors/brands/webflow-com), NBA (https://brandsweets.com/colors/brands/nba-com). — https://brandsweets.com/colors/cornflowerblue
- **Crimson** #dc143c [pool] — Crimson is paired with #665fe7 in 14 real palettes, including Marvel's brand system and Behance's brand system, as the accent. Seen in: Marvel (https://brandsweets.com/colors/brands/marvel-com), Behance (https://brandsweets.com/colors/brands/behance-net), Chase (https://brandsweets.com/colors/brands/chase-com), Pizza Hut (https://brandsweets.com/colors/brands/pizzahut-com). — https://brandsweets.com/colors/crimson
- **Deep Sky Blue** #00bfff [pool] — Designers have shipped Deep Sky Blue with #665fe7: 7 real palettes, including Calm's brand system and Elastic's brand system, as the lead colour. Seen in: Calm (https://brandsweets.com/colors/brands/calm-com), Elastic (https://brandsweets.com/colors/brands/elastic-co), Astro (https://brandsweets.com/colors/brands/astro-build), Patreon (https://brandsweets.com/colors/brands/patreon-com). — https://brandsweets.com/colors/deepskyblue

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

- On white (#ffffff): 4.82:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #443ce2 (7.02:1)
- On black (#000000): 4.36:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #6a64e8 (4.6:1); AA: background → #f7f7f7 (4.5:1); AAA: text → #918cee (7.19:1)

## Brands using this color

- **Calm** — accent #6461e0 (Δ 1.199) — https://brandsweets.com/colors/brands/calm-com

## Fonts for this mood

- technical: https://brandsweets.com/fonts/mood/technical
- modern: https://brandsweets.com/fonts/mood/modern

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/665fe7-a39cc4-dfa04e-261f2d-e9edf1?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: "#665fe7" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.