Color

#123f37

#123f37
hex#123f37
rgbrgb(18, 63, 55)
hslhsl(169, 56%, 16%)
oklchoklch(0.334 0.051 179.1)
Closest name: Botanical Night (#12403c)Relative luminance 0.0396

Colors that go with #123f37

Sea Green, Teal and Amber 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 →

#40121a

#124020 · #123140

#371240 · #403712

Split-complementary

Open in tool →

#401231 · #402012

#201240 · #40121a · #314012

Contrast

#123f37 as textRatioAAAA largeAAAFix
Aaon white
11.72:1passpasspassPasses AAA — no fix needed.
Aaon black
1.79:1failfailfail
  • AA: use #258372 as the text (4.57:1)
  • AAA: use #2fa791 as the text (7.06:1)
  • AA: or shift the background to #a1a1a1 (4.54:1)
  • AAA: or shift the background to #c9c9c9 (7.08:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #123f37 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#123f37 reads as dark, luxury, bold. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #123f37
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 #123f37 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/123f37-a2bebc-d459ab-1f2a2d-e9f1ec?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