Color

#288fa9

#288fa9
hex#288fa9
rgbrgb(40, 143, 169)
hslhsl(192, 62%, 41%)
oklchoklch(0.604 0.098 218.9)
Closest name: Blue Moon (#3992a8)Relative luminance 0.2296

Tints & shades

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

Harmonies

Complementary

Open in tool →

#a94228

#28a982 · #284fa9

#a9288f · #8fa928

Split-complementary

Open in tool →

#a9284f · #a98228

#8228a9 · #a94228 · #4fa928

Contrast

#288fa9 as textRatioAAAA largeAAAFix
Aaon white
3.76:1failpassfail
  • AA: use #237e95 as the text (4.68:1)
  • AAA: use #1a5e70 as the text (7.29:1)
  • AA: or shift the background to #1c1c1c (4.54:1)
Aaon black
5.59:1passpassfail
  • AAA: use #2ea4c2 as the text (7.21:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #288fa9 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

#288fa9 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #288fa9
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #288fa9 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/288fa9-a2b5be-df4e77-1f242d-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