Color

#12243b

#12243b
hex#12243b
rgbrgb(18, 36, 59)
hslhsl(214, 53%, 15%)
oklchoklch(0.258 0.05 255.3)
Closest name: Dark Eclipse (#112244)Relative luminance 0.0171

Tints & shades

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

Harmonies

Complementary

Open in tool →

#3b2912

#12383b · #15123b

#3b1224 · #243b12

Split-complementary

Open in tool →

#3b1512 · #383b12

#3b1238 · #3b2912 · #123b15

Contrast

#12243b as textRatioAAAA largeAAAFix
Aaon white
15.66:1passpasspassPasses AAA — no fix needed.
Aaon black
1.34:1failfailfail
  • AA: use #3c76c3 as the text (4.57:1)
  • AAA: use #6f9ad3 as the text (7.24:1)
  • AA: or shift the background to #8a8a8a (4.54:1)
  • AAA: or shift the background to #b0b0b0 (7.22:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #12243b as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#12243b reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #12243b
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 #12243b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/12243b-9ca9c4-df5a4e-1f1f2d-e9f0f1?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