Color
#51839e
#51839ergb(81, 131, 158)hsl(201, 32%, 47%)oklch(0.585 0.068 233.2)Colors that go with #51839e
Charcoal, Copper and Amber lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #51839e: softer than #000 and cool enough to feel like part of the same palette.
Amber #ffbf00
shippedAmber is paired with #51839e in 4 real palettes, including Beach Hut and Wired's brand system, as the supporting colour.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #51839e: 6 real palettes, including Hershey's's brand system and Fintech Trust, as the supporting colour.
Crimson #dc143c
shippedCrimson is paired with #51839e in 12 real palettes, including Retro Pop and Redfin's brand system, as the lead colour.
Deep Sky Blue #00bfff
shippedDesigners have shipped Deep Sky Blue with #51839e: 5 real palettes, including Telegram's brand system and Deep Water, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #51839e: 16 real palettes, including Campus and Discover's brand system, as the lead colour.
Firebrick #b22222
shippedDesigners have shipped Firebrick with #51839e: 4 real palettes, including Honda's brand system and Wendy's's brand system, as the supporting colour.
Real palettes that use #51839e
Tints & shades
Harmonies
Contrast
| #51839e as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 4.13:1 | fail | pass | fail | |
Aaon black | 5.09:1 | pass | pass | fail |
|
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #51839e as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
›analyze #51839e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/51839e-9cb1c4-df4e62-1f222d-e9f1f0?lock=0&style=vibrantWant the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.
Machine-readable: color.md