Color
#5181a4
#5181a4rgb(81, 129, 164)hsl(205, 34%, 48%)oklch(0.583 0.075 241.3)Colors that go with #5181a4
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 #5181a4: softer than #000 and cool enough to feel like part of the same palette.
Copper #b87333
complementaryshippedCopper sits directly opposite #5181a4 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Amber #ffbf00
shippedAmber is paired with #5181a4 in 7 real palettes, including Beach Hut and Wired's brand system, as the supporting colour.
Blue #0000ff
shipped4 real palettes, including Qualcomm's brand system and Activision's brand system put Blue beside #5181a4, as the accent.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #5181a4: 6 real palettes, including Hershey's's brand system and Fintech Trust, as the supporting colour.
Crimson #dc143c
shippedCrimson is paired with #5181a4 in 12 real palettes, including Retro Pop and Wendy's's brand system, as the lead colour.
Deep Sky Blue #00bfff
shippedDesigners have shipped Deep Sky Blue with #5181a4: 5 real palettes, including Deep Water and Telegram's brand system, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #5181a4: 15 real palettes, including Campus and Discover's brand system, as the lead colour.
Real palettes that use #5181a4
Tints & shades
Harmonies
Contrast
| #5181a4 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 4.18:1 | fail | pass | fail | |
Aaon black | 5.03:1 | 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 #5181a4 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 #5181a4 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/5181a4-9cafc4-df4e58-1f212d-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