Color

#243f7b

#243f7b
hex#243f7b
rgbrgb(36, 63, 123)
hslhsl(221, 55%, 31%)
oklchoklch(0.381 0.107 263.8)
Closest name: Evening Magic (#363e7d)Relative luminance 0.0536

Tints & shades

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

Harmonies

Complementary

Open in tool →

#7b5f24

#246b7b · #34247b

#7b243f · #3f7b24

Split-complementary

Open in tool →

#7b3424 · #6b7b24

#7b246b · #7b5f24 · #247b34

Contrast

#243f7b as textRatioAAAA largeAAAFix
Aaon white
10.13:1passpasspassPasses AAA — no fix needed.
Aaon black
2.07:1failfailfail
  • AA: use #4972ca as the text (4.54:1)
  • AAA: use #7997d8 as the text (7.23:1)
  • AA: or shift the background to #adadad (4.52:1)
  • AAA: or shift the background to #d9d9d9 (7.18:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #243f7b 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

#243f7b reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #243f7b
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 #243f7b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/243f7b-9ca4c4-df6b4e-211f2d-e9eff1?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