Color

#288da9

#288da9
hex#288da9
rgbrgb(40, 141, 169)
hslhsl(193, 62%, 41%)
oklchoklch(0.599 0.098 220.9)
Closest name: Blue Moon (#3992a8)Relative luminance 0.2237

Colors that go with #288da9

Charcoal, Copper and Crimson 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 →

#a94428

#28a985 · #284ca9

#a9288d · #8da928

Split-complementary

Open in tool →

#a9284c · #a98528

#8528a9 · #a94428 · #4ca928

Contrast

#288da9 as textRatioAAAA largeAAAFix
Aaon white
3.84:1failpassfail
  • AA: use #247f99 as the text (4.59:1)
  • AAA: use #1b6074 as the text (7.07:1)
  • AA: or shift the background to #1a1a1a (4.54:1)
Aaon black
5.47:1passpassfail
  • AAA: use #2ea2c2 as the text (7.06:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #288da9 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

#288da9 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #288da9
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 #288da9 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/288da9-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