Color

#42909e

#42909e
hex#42909e
rgbrgb(66, 144, 158)
hslhsl(189, 41%, 44%)
oklchoklch(0.61 0.079 211)
Closest name: Blue Moon (#3992a8)Relative luminance 0.2357

Colors that go with #42909e

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.

Real palettes that use #42909e

Tints & shades

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

Harmonies

Complementary

Open in tool →

#9e5042

#429e7e · #42629e

#9e4290 · #909e42

Split-complementary

Open in tool →

#9e4262 · #9e7e42

#7e429e · #9e5042 · #629e42

Contrast

#42909e as textRatioAAAA largeAAAFix
Aaon white
3.67:1failpassfail
  • AA: use #3b808c as the text (4.51:1)
  • AAA: use #2c5f68 as the text (7.13:1)
  • AA: or shift the background to #1c1c1c (4.64:1)
Aaon black
5.71:1passpassfail
  • AAA: use #4aa1b0 as the text (7.02:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #42909e 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

#42909e reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #42909e
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 #42909e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/42909e-a2b7be-df4e7e-1f252d-e9f1ee?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