Color

#00423a

#00423a
hex#00423a
rgbrgb(0, 66, 58)
hslhsl(173, 100%, 13%)
oklchoklch(0.34 0.061 181.5)
Closest name: Botanical Night (#12403c)Relative luminance 0.042

Colors that go with #00423a

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 →

#420008

#004219 · #002942

#3b0042 · #423b00

Split-complementary

Open in tool →

#420029 · #421900

#190042 · #420008 · #294200

Contrast

#00423a as textRatioAAAA largeAAAFix
Aaon white
11.41:1passpasspassPasses AAA — no fix needed.
Aaon black
1.84:1failfailfail
  • AA: use #008575 as the text (4.61:1)
  • AAA: use #00a895 as the text (7.04:1)
  • AA: or shift the background to #a3a3a3 (4.52:1)
  • AAA: or shift the background to #cccccc (7.11:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #00423a as the background.

Brands using this color

Fonts for this mood

#00423a reads as vivid, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #00423a
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 #00423a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/00423a-a2bebe-d459a3-1f292d-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