Color

#151e8a

#151e8a
hex#151e8a
rgbrgb(21, 30, 138)
hslhsl(235, 74%, 31%)
oklchoklch(0.324 0.173 268.7)
Closest name: Deepsea Kraken (#082599)Relative luminance 0.0292

Tints & shades

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

Harmonies

Complementary

Open in tool →

#8a8015

#15598a · #45158a

#8a151e · #1e8a15

Split-complementary

Open in tool →

#8a4515 · #598a15

#8a1559 · #8a8015 · #158a45

Contrast

#151e8a as textRatioAAAA largeAAAFix
Aaon white
13.25:1passpasspassPasses AAA — no fix needed.
Aaon black
1.58:1failfailfail
  • AA: use #5f6be7 as the text (4.74:1)
  • AAA: use #8790ed as the text (7.24:1)
  • AA: or shift the background to #999999 (4.65:1)
  • AAA: or shift the background to #bdbdbd (7.05:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #151e8a as the background.

Brands using this color

Fonts for this mood

#151e8a reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #151e8a
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 #151e8a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/151e8a-9e9cc4-df8d4e-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