Color

#42898f

#42898f
hex#42898f
rgbrgb(66, 137, 143)
hslhsl(185, 37%, 41%)
oklchoklch(0.587 0.072 202.8)
Closest name: darkcyan (#008b8b)Relative luminance 0.2103

Colors that go with #42898f

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.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#8f4842

#428f6f · #42628f

#8f4289 · #898f42

Split-complementary

Open in tool →

#8f4262 · #8f6f42

#6f428f · #8f4842 · #628f42

Contrast

#42898f as textRatioAAAA largeAAAFix
Aaon white
4.03:1failpassfail
  • AA: use #3d7f85 as the text (4.59:1)
  • AAA: use #2d5d62 as the text (7.36:1)
  • AA: or shift the background to #141414 (4.57:1)
Aaon black
5.21:1passpassfail
  • AAA: use #4fa3ab as the text (7.16:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #42898f as the background.

Brands using this color

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

Palettes built around it

Fonts for this mood

#42898f reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #42898f
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 #42898f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/42898f-a2b8be-df4e88-1f262d-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