Color

#effc5f

#effc5f
hex#effc5f
rgbrgb(239, 252, 95)
hslhsl(65, 96%, 68%)
oklchoklch(0.953 0.177 113.8)
Closest name: Biohazard Suit (#fbfb4c)Relative luminance 0.888

Colors that go with #effc5f

Lilac, Blue 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 →

#6c5ffc

#fcba5f · #a0fc5f

#5feffc · #fc5fef

Split-complementary

Open in tool →

#5fa0fc · #ba5ffc

#5ffcba · #6c5ffc · #fc5fa0

Contrast

#effc5f as textRatioAAAA largeAAAFix
Aaon white
1.12:1failfailfail
  • AA: use #737d03 as the text (4.5:1)
  • AAA: use #535a02 as the text (7.42:1)
  • AA: or shift the background to #6e6e6e (4.55:1)
  • AAA: or shift the background to #4f4f4f (7.32:1)
Aaon black
18.76:1passpasspassPasses 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 #effc5f 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 #effc5f
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 #effc5f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/effc5f-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