Color

#ddf529

#ddf529
hex#ddf529
rgbrgb(221, 245, 41)
hslhsl(67, 91%, 56%)
oklchoklch(0.921 0.204 116.9)
Closest name: Banana Flash (#eefe02)Relative luminance 0.8084

Colors that go with #ddf529

Blue, Charcoal and Crimson 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 →

#4129f5

#f5a729 · #77f529

#29ddf5 · #f529dd

Split-complementary

Open in tool →

#2977f5 · #a729f5

#29f5a7 · #4129f5 · #f52977

Contrast

#ddf529 as textRatioAAAA largeAAAFix
Aaon white
1.22:1failfailfail
  • AA: use #6c7a06 as the text (4.75:1)
  • AAA: use #525d04 as the text (7.18:1)
  • AA: or shift the background to #666666 (4.69:1)
  • AAA: or shift the background to #4a4a4a (7.24:1)
Aaon black
17.17:1passpasspassPasses 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 #ddf529 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 #ddf529
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 #ddf529 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/ddf529-b8bea2-4e83df-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