Color

#ddf90b

#ddf90b
hex#ddf90b
rgbrgb(221, 249, 11)
hslhsl(67, 95%, 51%)
oklchoklch(0.929 0.214 117.7)
Closest name: Banana Flash (#eefe02)Relative luminance 0.8315

Colors that go with #ddf90b

Crimson, Plum and Violet 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 →

#270bf9

#f99e0b · #66f90b

#0bddf9 · #f90bdd

Split-complementary

Open in tool →

#0b66f9 · #9e0bf9

#0bf99e · #270bf9 · #f90b66

Contrast

#ddf90b as textRatioAAAA largeAAAFix
Aaon white
1.19:1failfailfail
  • AA: use #6e7c03 as the text (4.62:1)
  • AAA: use #545e02 as the text (7.05:1)
  • AA: or shift the background to #696969 (4.61:1)
  • AAA: or shift the background to #4d4d4d (7.1:1)
Aaon black
17.63:1passpasspassPasses 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 #ddf90b as the background.

Brands using this color

mcpConnect your agent — build around #ddf90b
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 #ddf90b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/ddf90b-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