Color

#131981

#131981
hex#131981
rgbrgb(19, 25, 129)
hslhsl(237, 74%, 29%)
oklchoklch(0.305 0.167 268.9)
Closest name: midnightblue (#191970)Relative luminance 0.0242

Tints & shades

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

Harmonies

Complementary

Open in tool →

#817b13

#134f81 · #441381

#811319 · #198113

Split-complementary

Open in tool →

#814413 · #4f8113

#81134f · #817b13 · #138144

Contrast

#131981 as textRatioAAAA largeAAAFix
Aaon white
14.15:1passpasspassPasses AAA — no fix needed.
Aaon black
1.48:1failfailfail
  • AA: use #5f66e7 as the text (4.54:1)
  • AAA: use #878ced as the text (7:1)
  • AA: or shift the background to #949494 (4.67:1)
  • AAA: or shift the background to #b8b8b8 (7.13:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #131981 as the background.

Brands using this color

Fonts for this mood

#131981 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #131981
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 #131981 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/131981-9f9cc4-df924e-251f2d-e9edf1?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