Color

#309121

#309121
hex#309121
rgbrgb(48, 145, 33)
hslhsl(112, 63%, 35%)
oklchoklch(0.578 0.172 141.2)
Closest name: Emerald (#028f1e)Relative luminance 0.2099

Colors that go with #309121

Crimson, Royal Blue and Charcoal 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 →

#822191

#689121 · #21914a

#213091 · #912130

Split-complementary

Open in tool →

#4a2191 · #912168

#216891 · #822191 · #914a21

Contrast

#309121 as textRatioAAAA largeAAAFix
Aaon white
4.04:1failpassfail
  • AA: use #2c851e as the text (4.69:1)
  • AAA: use #216417 as the text (7.24:1)
  • AA: or shift the background to #141414 (4.56:1)
Aaon black
5.2:1passpassfail
  • AAA: use #3aaf28 as the text (7.34:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #309121 as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

mcpConnect your agent — build around #309121
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 #309121 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/309121-a2bea2-864edf-1f2d23-eef1e9?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