Color

#eff45d

#eff45d
hex#eff45d
rgbrgb(239, 244, 93)
hslhsl(62, 87%, 66%)
oklchoklch(0.936 0.17 111.1)
Closest name: Buttercup Glow (#f1f458)Relative luminance 0.8384

Colors that go with #eff45d

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 →

#625df4

#f4ad5d · #a3f45d

#5deff4 · #f45def

Split-complementary

Open in tool →

#5da3f4 · #ad5df4

#5df4ad · #625df4 · #f45da3

Contrast

#eff45d as textRatioAAAA largeAAAFix
Aaon white
1.18:1failfailfail
  • AA: use #747708 as the text (4.79:1)
  • AAA: use #585b06 as the text (7.21:1)
  • AA: or shift the background to #6b6b6b (4.51:1)
  • AAA: or shift the background to #4d4d4d (7.15:1)
Aaon black
17.77:1passpasspassPasses 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 #eff45d 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 #eff45d
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 #eff45d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/eff45d-babea2-4e8fdf-272d1f-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