Color

#a4b021

#a4b021
hex#a4b021
rgbrgb(164, 176, 33)
hslhsl(65, 68%, 41%)
oklchoklch(0.724 0.155 114.7)
Closest name: Citrus (#9fb70a)Relative luminance 0.3905

Colors that go with #a4b021

Cornflower Blue, Champagne and Dark Olive Green 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 →

#2d21b0

#b07421 · #5db021

#21a4b0 · #b021a4

Split-complementary

Open in tool →

#215db0 · #7421b0

#21b074 · #2d21b0 · #b0215d

Contrast

#a4b021 as textRatioAAAA largeAAAFix
Aaon white
2.38:1failfailfail
  • AA: use #747c18 as the text (4.53:1)
  • AAA: use #545a11 as the text (7.37:1)
  • AA: or shift the background to #3d3d3d (4.56:1)
  • AAA: or shift the background to #1c1c1c (7.15:1)
Aaon black
8.81:1passpasspassPasses 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 #a4b021 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 #a4b021
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 #a4b021 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/a4b021-b8bea2-4e88df-262d1f-f1eee9?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