Color

#288fb8

#288fb8
hex#288fb8
rgbrgb(40, 143, 184)
hslhsl(197, 64%, 44%)
oklchoklch(0.611 0.109 229.8)
Closest name: Blue Moon (#3992a8)Relative luminance 0.2356

Colors that go with #288fb8

Charcoal, Crimson 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.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#b85128

#28b899 · #2848b8

#b8288f · #8fb828

Split-complementary

Open in tool →

#b82848 · #b89928

#9928b8 · #b85128 · #48b828

Contrast

#288fb8 as textRatioAAAA largeAAAFix
Aaon white
3.68:1failpassfail
  • AA: use #247fa3 as the text (4.53:1)
  • AAA: use #1b5e79 as the text (7.18:1)
  • AA: or shift the background to #1c1c1c (4.63:1)
Aaon black
5.71:1passpassfail
  • AAA: use #2da0cd 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 #288fb8 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

#288fb8 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #288fb8
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 #288fb8 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/288fb8-9cb4c4-df4e6b-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