Color

#a3cc00

#a3cc00
hex#a3cc00
rgbrgb(163, 204, 0)
hslhsl(72, 100%, 40%)
oklchoklch(0.787 0.193 123)
Closest name: yellowgreen (#9acd32)Relative luminance 0.5097

Colors that go with #a3cc00

Taupe, Plum and Blue 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 →

#2900cc

#cc8f00 · #3dcc00

#00a3cc · #cc00a3

Split-complementary

Open in tool →

#003dcc · #8f00cc

#00cc8f · #2900cc · #cc003d

Contrast

#a3cc00 as textRatioAAAA largeAAAFix
Aaon white
1.88:1failfailfail
  • AA: use #668000 as the text (4.51:1)
  • AAA: use #495c00 as the text (7.46:1)
  • AA: or shift the background to #4d4d4d (4.51:1)
  • AAA: or shift the background to #303030 (7.04:1)
Aaon black
11.19:1passpasspassPasses 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 #a3cc00 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 #a3cc00
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 #a3cc00 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/a3cc00-b5bea2-4e77df-242d1f-f1efe9?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