Color

#eef21c

#eef21c
hex#eef21c
rgbrgb(238, 242, 28)
hslhsl(61, 89%, 53%)
oklchoklch(0.928 0.2 111)
Closest name: Banana Bandanna (#f8f739)Relative luminance 0.8177

Colors that go with #eef21c

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 →

#201cf2

#f28b1c · #84f21c

#1ceef2 · #f21cee

Split-complementary

Open in tool →

#1c84f2 · #8b1cf2

#1cf28b · #201cf2 · #f21c84

Contrast

#eef21c as textRatioAAAA largeAAAFix
Aaon white
1.21:1failfailfail
  • AA: use #777807 as the text (4.69:1)
  • AAA: use #5a5c05 as the text (7.08:1)
  • AA: or shift the background to #696969 (4.54:1)
  • AAA: or shift the background to #4a4a4a (7.32:1)
Aaon black
17.35:1passpasspassPasses 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 #eef21c as the background.

Brands using this color

mcpConnect your agent — build around #eef21c
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 #eef21c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/eef21c-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