Color

#288da4

#288da4
hex#288da4
rgbrgb(40, 141, 164)
hslhsl(191, 61%, 40%)
oklchoklch(0.597 0.095 216.7)
Closest name: Blue Moon (#3992a8)Relative luminance 0.2218

Tints & shades

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

Harmonies

Complementary

Open in tool →

#a43f28

#28a47d · #284fa4

#a4288d · #8da428

Split-complementary

Open in tool →

#a4284f · #a47d28

#7d28a4 · #a43f28 · #4fa428

Contrast

#288da4 as textRatioAAAA largeAAAFix
Aaon white
3.86:1failpassfail
  • AA: use #247f94 as the text (4.63:1)
  • AAA: use #1b5f6f as the text (7.21:1)
  • AA: or shift the background to #1a1a1a (4.51:1)
Aaon black
5.44:1passpassfail
  • AAA: use #2ea3bd as the text (7.09:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #288da4 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

#288da4 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #288da4
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 #288da4 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/288da4-a2b6be-df4e7a-1f252d-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