Color

#eff25a

#eff25a
hex#eff25a
rgbrgb(239, 242, 90)
hslhsl(61, 85%, 65%)
oklchoklch(0.932 0.17 110.4)
Closest name: Buttercup Glow (#f1f458)Relative luminance 0.8259

Colors that go with #eff25a

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 →

#5c5af2

#f2a85a · #a3f25a

#5aeff2 · #f25aef

Split-complementary

Open in tool →

#5aa3f2 · #a85af2

#5af2a8 · #5c5af2 · #f25aa3

Contrast

#eff25a as textRatioAAAA largeAAAFix
Aaon white
1.2:1failfailfail
  • AA: use #797b0a as the text (4.52:1)
  • AAA: use #585a07 as the text (7.29:1)
  • AA: or shift the background to #696969 (4.58:1)
  • AAA: or shift the background to #4d4d4d (7.05:1)
Aaon black
17.52:1passpasspassPasses 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 #eff25a 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 #eff25a
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 #eff25a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/eff25a-babea2-4e92df-272d1f-f1ede9?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