Color
#51939e
#51939ergb(81, 147, 158)hsl(189, 32%, 47%)oklch(0.624 0.069 209.4)Colors that go with #51939e
Charcoal, Copper and Cobalt Blue 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 #51939e: softer than #000 and cool enough to feel like part of the same palette.
Copper #b87333
split-complementshippedCopper is a split-complement of #51939e: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #51939e: 5 real palettes, including Fintech Trust and Hershey's's brand system, as the lead colour.
Crimson #dc143c
shippedCrimson is paired with #51939e in 8 real palettes, including Diner and Retro Pop, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #51939e: 13 real palettes, including Peacock and Dusk, as the supporting colour.
Goldenrod #daa520
shippedGoldenrod shows up next to #51939e in 4 real palettes, including Ledger Dark and Noir Beauty, as the lead colour.
Midnight Blue #191970
shipped10 real palettes, including Tide Pool and Ford's brand system put Midnight Blue beside #51939e, as that palette's text colour.
Orange #ffa500
shipped4 real palettes, including Campus and Gopro's brand system put Orange beside #51939e, as the accent.
Real palettes that use #51939e
Tints & shades
Harmonies
Contrast
| #51939e as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 3.49:1 | fail | pass | fail | |
Aaon black | 6.02:1 | 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 #51939e 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 #51939e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/51939e-a2b7be-df4e7e-1f252d-e9f1ee?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