Color

#42879a

#42879a
hex#42879a
rgbrgb(66, 135, 154)
hslhsl(193, 40%, 43%)
oklchoklch(0.586 0.075 218.2)
Closest name: Blue Moon (#3992a8)Relative luminance 0.2082

Colors that go with #42879a

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.

Real palettes that use #42879a

Tints & shades

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

Harmonies

Complementary

Open in tool →

#9a5542

#429a81 · #425b9a

#9a4287 · #879a42

Split-complementary

Open in tool →

#9a425b · #9a8142

#81429a · #9a5542 · #5b9a42

Contrast

#42879a as textRatioAAAA largeAAAFix
Aaon white
4.07:1failpassfail
  • AA: use #3d7d8f as the text (4.64:1)
  • AAA: use #2e5e6b as the text (7.17:1)
  • AA: or shift the background to #141414 (4.53:1)
Aaon black
5.16:1passpassfail
  • AAA: use #54a0b6 as the text (7.08:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #42879a 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

#42879a reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #42879a
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 #42879a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/42879a-a2b5be-df4e75-1f242d-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