Color

#12256d

#12256d
hex#12256d
rgbrgb(18, 37, 109)
hslhsl(227, 72%, 25%)
oklchoklch(0.303 0.127 266.8)
Closest name: Black Sea Night (#052462)Relative luminance 0.0256

Colors that go with #12256d

Charcoal, Steel Blue and Blue lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#6e5a12

#12546e · #2c126e

#6e1226 · #266e12

Split-complementary

Open in tool →

#6e2c12 · #546e12

#6e1254 · #6e5a12 · #126e2c

Contrast

#12256d as textRatioAAAA largeAAAFix
Aaon white
13.9:1passpasspassPasses AAA — no fix needed.
Aaon black
1.51:1failfailfail
  • AA: use #4b6ce2 as the text (4.54:1)
  • AAA: use #7b93ea as the text (7.2:1)
  • AA: or shift the background to #949494 (4.58:1)
  • AAA: or shift the background to #b8b8b8 (7.01:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #12256d as the background.

Brands using this color

Fonts for this mood

#12256d reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #12256d
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #12256d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/12256d-9ca0c4-df7a4e-221f2d-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