Color

#280359

#280359
hex#280359
rgbrgb(40, 3, 89)
hslhsl(266, 93%, 18%)
oklchoklch(0.249 0.133 293.1)
Closest name: Hollow Knight (#330055)Relative luminance 0.0124

Tints & shades

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

Harmonies

Complementary

Open in tool →

#345903

#030959 · #530359

#592803 · #035928

Split-complementary

Open in tool →

#595303 · #095903

#590309 · #345903 · #035953

Contrast

#280359 as textRatioAAAA largeAAAFix
Aaon white
16.83:1passpasspassPasses AAA — no fix needed.
Aaon black
1.25:1failfailfail
  • AA: use #9549f8 as the text (4.59:1)
  • AAA: use #b27afa as the text (7.06:1)
  • AA: or shift the background to #858585 (4.56:1)
  • AAA: or shift the background to #a8a8a8 (7.08:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #280359 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

#280359 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #280359
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 #280359 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/280359-b29cc4-dfd74e-2b1f2d-e9eaf1?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