# #4591e8

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

## Values

- Hex: `#4591e8`
- RGB: rgb(69, 145, 232)
- HSL: hsl(212, 78%, 59%)
- OKLCH: oklch(0.65 0.151 253.7)
- Relative luminance: 0.2734
- Nearest named color: Blue Jay (#5588dd, Δ 2.729) — https://brandsweets.com/colors/blue-jay
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/4591e8

## Tints & shades

- Tints (toward white): #579cea, #69a6ec, #7bb1ef, #8ebcf1, #a0c7f3, #adcff5, #bfd9f7, #d2e4f9, #e4effc, #f6fafe
- Shades (toward black): #2e84e5, #1b74da, #1868c3, #1559a8, #124d91, #0f3f76, #0c335f, #082444, #06182d, #020a12

## Harmonies

- Complementary: #e89c45
- Analogous: #45e3e8, #4a45e8
- Triadic: #e84591, #91e845
- Split-complementary: #e84a45, #e3e845
- Tetradic: #e845e3, #e89c45, #45e84a

## Colors that go with #4591e8

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 #4591e8: softer than #000 and cool enough to feel like part of the same palette. Seen in: Blizzard (https://brandsweets.com/colors/brands/blizzard-com), Lamborghini (https://brandsweets.com/colors/brands/lamborghini-com), Disney (https://brandsweets.com/colors/brands/disney-com), Lido (https://brandsweets.com/palettes/vivid#lido). — https://brandsweets.com/colors/charcoal
- **Amber** #ffbf00 [pool] — Amber is paired with #4591e8 in 10 real palettes, including Google's brand system and Heatwave, as the accent. Seen in: Google (https://brandsweets.com/colors/brands/google-com), Heatwave (https://brandsweets.com/palettes/warm#heatwave), Blueprint (https://brandsweets.com/palettes/technical#blueprint), Mastodon hosted on mastodon.social (https://brandsweets.com/colors/brands/mastodon-social). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 11 real palettes, including Qualcomm's brand system and Unity's brand system put Blue beside #4591e8, as the accent. Seen in: Qualcomm (https://brandsweets.com/colors/brands/qualcomm-com), Unity (https://brandsweets.com/colors/brands/unity-com), Readymag (https://brandsweets.com/colors/brands/readymag-com), Cargo (https://brandsweets.com/colors/brands/cargo-site). — https://brandsweets.com/colors/blue
- **Blue Violet** #8a2be2 [pool] — Blue Violet is paired with #4591e8 in 4 real palettes, including Render's brand system and ClickUp's brand system, as the lead colour. Seen in: Render (https://brandsweets.com/colors/brands/render-com), ClickUp (https://brandsweets.com/colors/brands/clickup-com), Circuit (https://brandsweets.com/palettes/technical#circuit), Yahoo (https://brandsweets.com/colors/brands/yahoo-com). — https://brandsweets.com/colors/blueviolet
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #4591e8: 7 real palettes, including Blue Mono and Hershey's's brand system, as the lead colour. Seen in: Blue Mono (https://brandsweets.com/palettes/cool#blue-mono), Hershey's (https://brandsweets.com/colors/brands/hersheys-com), Carrefour (https://brandsweets.com/colors/brands/carrefour-com), General Mills (https://brandsweets.com/colors/brands/generalmills-com). — https://brandsweets.com/colors/cobalt
- **Crimson** #dc143c [pool] — Crimson is paired with #4591e8 in 8 real palettes, including NASCAR's brand system and Pizza Hut's brand system, as the supporting colour. Seen in: NASCAR (https://brandsweets.com/colors/brands/nascar-com), Pizza Hut (https://brandsweets.com/colors/brands/pizzahut-com), Marvel (https://brandsweets.com/colors/brands/marvel-com), Foot Locker (https://brandsweets.com/colors/brands/footlocker-com). — https://brandsweets.com/colors/crimson
- **Dark Orange** #ff8c00 [pool] — Dark Orange shows up next to #4591e8 in 4 real palettes, including Playground and Elastic's brand system, as the lead colour. Seen in: Playground (https://brandsweets.com/palettes/bold#playground), Elastic (https://brandsweets.com/colors/brands/elastic-co), Learning App (https://brandsweets.com/palettes/playful#learning-app), Ahrefs (https://brandsweets.com/colors/brands/ahrefs-com). — https://brandsweets.com/colors/darkorange
- **Dark Goldenrod** #b8860b [harmony: complementary] — Dark Goldenrod sits directly opposite #4591e8 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/darkgoldenrod

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

- On white (#ffffff): 3.25:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #1b74da (4.61:1); AA: background → #262626 (4.66:1); AAA: text → #1457a3 (7.19:1)
- On black (#000000): 6.47:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #5399ea (7.11:1)

## 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/4591e8-9caac4-df564e-1f202d-e9f1f1?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: "#4591e8" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.