Color

#288bdc

#288bdc
hex#288bdc
rgbrgb(40, 139, 220)
hslhsl(207, 72%, 51%)
oklchoklch(0.621 0.151 248.4)
Closest name: Blue Jay (#5588dd)Relative luminance 0.2408

Tints & shades

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

Harmonies

Complementary

Open in tool →

#dc7928

#28dcd3 · #2831dc

#dc288b · #8bdc28

Split-complementary

Open in tool →

#dc2831 · #dcd328

#d328dc · #dc7928 · #31dc28

Contrast

#288bdc as textRatioAAAA largeAAAFix
Aaon white
3.61:1failpassfail
  • AA: use #1f78c1 as the text (4.65:1)
  • AAA: use #185a91 as the text (7.22:1)
  • AA: or shift the background to #1f1f1f (4.57:1)
Aaon black
5.82:1passpassfail
  • AAA: use #479ce1 as the text (7.11:1)

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

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

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

tool url/palettes/new/288bdc-9cadc4-df4e53-1f212d-e9f1f1?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