Color

#a3d331

#a3d331
hex#a3d331
rgbrgb(163, 211, 49)
hslhsl(78, 65%, 51%)
oklchoklch(0.805 0.187 125.3)
Closest name: yellowgreen (#9acd32)Relative luminance 0.546

Colors that go with #a3d331

Deep Sky Blue, Taupe and Plum 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.

Real palettes that use #a3d331

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#6231d3

#d3b331 · #51d331

#31a3d3 · #d331a3

Split-complementary

Open in tool →

#3151d3 · #b331d3

#31d3b3 · #6231d3 · #d33151

Contrast

#a3d331 as textRatioAAAA largeAAAFix
Aaon white
1.76:1failfailfail
  • AA: use #607e1b as the text (4.67:1)
  • AAA: use #475d14 as the text (7.38:1)
  • AA: or shift the background to #4f4f4f (4.65:1)
  • AAA: or shift the background to #333333 (7.17:1)
Aaon black
11.92:1passpasspassPasses 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 #a3d331 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 #a3d331
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 #a3d331 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/a3d331-b2bea2-4e69df-232d1f-f1f0e9?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