Color

#5199b3

#5199b3
hex#5199b3
rgbrgb(81, 153, 179)
hslhsl(196, 39%, 51%)
oklchoklch(0.646 0.082 223.9)
Closest name: Blue Moon (#3992a8)Relative luminance 0.2779

Colors that go with #5199b3

Charcoal, Chocolate 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.

Real palettes that use #5199b3

Tints & shades

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

Harmonies

Complementary

Open in tool →

#b36b51

#51b39c · #5168b3

#b35199 · #99b351

Split-complementary

Open in tool →

#b35168 · #b39c51

#9c51b3 · #b36b51 · #68b351

Contrast

#5199b3 as textRatioAAAA largeAAAFix
Aaon white
3.2:1failpassfail
  • AA: use #407c91 as the text (4.66:1)
  • AAA: use #305d6e as the text (7.2:1)
  • AA: or shift the background to #292929 (4.54:1)
Aaon black
6.56:1passpassfail
  • AAA: use #5c9fb7 as the text (7.1:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #5199b3 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

#5199b3 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #5199b3
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 #5199b3 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/5199b3-9cb5c4-df4e6e-1f232d-e9f1ef?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