Color

#a3d312

#a3d312
hex#a3d312
rgbrgb(163, 211, 18)
hslhsl(75, 84%, 45%)
oklchoklch(0.804 0.198 124.7)
Closest name: yellowgreen (#9acd32)Relative luminance 0.5442

Colors that go with #a3d312

Taupe, Plum 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 →

#4312d3

#d3a312 · #43d312

#12a3d3 · #d312a3

Split-complementary

Open in tool →

#1243d3 · #a312d3

#12d3a3 · #4312d3 · #d31243

Contrast

#a3d312 as textRatioAAAA largeAAAFix
Aaon white
1.77:1failfailfail
  • AA: use #627f0b as the text (4.61:1)
  • AAA: use #485e08 as the text (7.29:1)
  • AA: or shift the background to #4f4f4f (4.64:1)
  • AAA: or shift the background to #333333 (7.15:1)
Aaon black
11.88:1passpasspassPasses 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 #a3d312 as the background.

Brands using this color

mcpConnect your agent — build around #a3d312
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 #a3d312 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/a3d312-b4bea2-4e70df-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