Color

#287da4

#287da4
hex#287da4
rgbrgb(40, 125, 164)
hslhsl(199, 61%, 40%)
oklchoklch(0.557 0.099 232.7)
Closest name: Bleu Ciel (#007ba1)Relative luminance 0.178

Tints & shades

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

Harmonies

Complementary

Open in tool →

#a44f28

#28a48d · #283fa4

#a4287d · #7da428

Split-complementary

Open in tool →

#a4283f · #a48d28

#8d28a4 · #a44f28 · #3fa428

Contrast

#287da4 as textRatioAAAA largeAAAFix
Aaon white
4.61:1passpassfail
  • AAA: use #1e5e7b as the text (7.14:1)
Aaon black
4.56:1passpassfail
  • AAA: use #3aa0cf 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 #287da4 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

#287da4 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #287da4
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 #287da4 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/287da4-9cb3c4-df4e66-1f232d-e9f1f0?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