Color

#5191c2

#5191c2
hex#5191c2
rgbrgb(81, 145, 194)
hslhsl(206, 48%, 54%)
oklchoklch(0.634 0.099 243.4)
Closest name: Canadian Tuxedo (#579aca)Relative luminance 0.259

Colors that go with #5191c2

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.

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#c28251

#51c2ba · #5159c2

#c25191 · #91c251

Split-complementary

Open in tool →

#c25159 · #c2ba51

#ba51c2 · #c28251 · #59c251

Contrast

#5191c2 as textRatioAAAA largeAAAFix
Aaon white
3.4:1failpassfail
  • AA: use #3c7aaa as the text (4.61:1)
  • AAA: use #2d5c80 as the text (7.11:1)
  • AA: or shift the background to #242424 (4.57:1)
Aaon black
6.18:1passpassfail
  • AAA: use #609bc7 as the text (7.01:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #5191c2 as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Fonts for this mood

#5191c2 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #5191c2
live endpoint

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.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #5191c2 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/5191c2-9caec4-df4e56-1f212d-e9f1f1?lock=0&style=vibrant

Want the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.

Machine-readable: color.md