Color

#280b89

#280b89
hex#280b89
rgbrgb(40, 11, 137)
hslhsl(254, 85%, 29%)
oklchoklch(0.314 0.181 278.5)
Closest name: Dramatic Blue (#240093)Relative luminance 0.025

Tints & shades

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

Harmonies

Complementary

Open in tool →

#6b890b

#0b2d89 · #670b89

#89280b · #0b8928

Split-complementary

Open in tool →

#89670b · #2d890b

#890b2d · #6b890b · #0b8967

Contrast

#280b89 as textRatioAAAA largeAAAFix
Aaon white
14.01:1passpasspassPasses AAA — no fix needed.
Aaon black
1.5:1failfailfail
  • AA: use #7d5af2 as the text (4.62:1)
  • AAA: use #9f84f5 as the text (7.09:1)
  • AA: or shift the background to #949494 (4.62:1)
  • AAA: or shift the background to #b8b8b8 (7.06:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #280b89 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

#280b89 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #280b89
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 #280b89 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/280b89-aa9cc4-dfbb4e-291f2d-e9ebf1?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