Color

#121e2b

#121e2b
hex#121e2b
rgbrgb(18, 30, 43)
hslhsl(211, 41%, 12%)
oklchoklch(0.231 0.031 251.2)
Closest name: Dark Knight (#151931)Relative luminance 0.0123

Tints & shades

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

Harmonies

Complementary

Open in tool →

#2b1f12

#122b2b · #12122b

#2b121e · #1e2b12

Split-complementary

Open in tool →

#2b1212 · #2b2b12

#2b122b · #2b1f12 · #122b12

Contrast

#121e2b as textRatioAAAA largeAAAFix
Aaon white
16.85:1passpasspassPasses AAA — no fix needed.
Aaon black
1.25:1failfailfail
  • AA: use #4879ad as the text (4.61:1)
  • AAA: use #739ac4 as the text (7.15:1)
  • AA: or shift the background to #858585 (4.57:1)
  • AAA: or shift the background to #a8a8a8 (7.09:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #121e2b as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#121e2b reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #121e2b
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 #121e2b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/121e2b-9cabc4-df534e-1f202d-e9f1f1?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