Color

#73c421

#73c421
hex#73c421
rgbrgb(115, 196, 33)
hslhsl(90, 71%, 45%)
oklchoklch(0.74 0.2 133.6)
Closest name: Blinking Terminal (#66cc00)Relative luminance 0.4323

Colors that go with #73c421

Blue, Charcoal and Taupe 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 →

#7321c4

#c4c421 · #21c421

#2173c4 · #c42173

Split-complementary

Open in tool →

#2121c4 · #c421c4

#21c4c4 · #7321c4 · #c42121

Contrast

#73c421 as textRatioAAAA largeAAAFix
Aaon white
2.18:1failfailfail
  • AA: use #4d8316 as the text (4.59:1)
  • AAA: use #386010 as the text (7.37:1)
  • AA: or shift the background to #424242 (4.62:1)
  • AAA: or shift the background to #242424 (7.13:1)
Aaon black
9.65:1passpasspassPasses AAA — no fix needed.

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #73c421 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 #73c421
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 #73c421 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/73c421-adbea2-514edf-202d1f-f1f1e9?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