Color

#151d89

#151d89
hex#151d89
rgbrgb(21, 29, 137)
hslhsl(236, 73%, 31%)
oklchoklch(0.321 0.173 268.8)
Closest name: Deepsea Kraken (#082599)Relative luminance 0.0284

Tints & shades

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

Harmonies

Complementary

Open in tool →

#898115

#155789 · #471589

#89151d · #1d8915

Split-complementary

Open in tool →

#894715 · #578915

#891557 · #898115 · #158947

Contrast

#151d89 as textRatioAAAA largeAAAFix
Aaon white
13.39:1passpasspassPasses AAA — no fix needed.
Aaon black
1.57:1failfailfail
  • AA: use #6069e6 as the text (4.66:1)
  • AAA: use #888fec as the text (7.19:1)
  • AA: or shift the background to #969696 (4.53:1)
  • AAA: or shift the background to #bdbdbd (7.12:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #151d89 as the background.

Brands using this color

Fonts for this mood

#151d89 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #151d89
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 #151d89 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/151d89-9e9cc4-df8f4e-241f2d-e9eef1?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