Color

#151a8a

#151a8a
hex#151a8a
rgbrgb(21, 26, 138)
hslhsl(237, 74%, 31%)
oklchoklch(0.318 0.177 269)
Closest name: Dramatic Blue (#240093)Relative luminance 0.0273

Tints & shades

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

Harmonies

Complementary

Open in tool →

#8a8415

#15558a · #49158a

#8a151a · #1a8a15

Split-complementary

Open in tool →

#8a4915 · #558a15

#8a1555 · #8a8415 · #158a49

Contrast

#151a8a as textRatioAAAA largeAAAFix
Aaon white
13.58:1passpasspassPasses AAA — no fix needed.
Aaon black
1.55:1failfailfail
  • AA: use #5f66e7 as the text (4.54:1)
  • AAA: use #878ced as the text (7:1)
  • AA: or shift the background to #969696 (4.59:1)
  • AAA: or shift the background to #bdbdbd (7.23:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #151a8a as the background.

Brands using this color

Fonts for this mood

#151a8a reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #151a8a
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 #151a8a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/151a8a-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