Color

#123b4e

#123b4e
hex#123b4e
rgbrgb(18, 59, 78)
hslhsl(199, 63%, 19%)
oklchoklch(0.333 0.056 232.1)
Closest name: Maniac Mansion (#004058)Relative luminance 0.0381

Tints & shades

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

Harmonies

Complementary

Open in tool →

#4f2512

#124f44 · #121d4f

#4f123c · #3c4f12

Split-complementary

Open in tool →

#4f121d · #4f4412

#44124f · #4f2512 · #1d4f12

Contrast

#123b4e as textRatioAAAA largeAAAFix
Aaon white
11.92:1passpasspassPasses AAA — no fix needed.
Aaon black
1.76:1failfailfail
  • AA: use #267ea6 as the text (4.62:1)
  • AAA: use #339fd1 as the text (7.02:1)
  • AA: or shift the background to #a1a1a1 (4.61:1)
  • AAA: or shift the background to #c7c7c7 (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 #123b4e 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

#123b4e reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #123b4e
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 #123b4e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/123b4e-9cb3c4-df4e66-1f232d-e9f1f0?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