Color

#d5f91f

#d5f91f
hex#d5f91f
rgbrgb(213, 249, 31)
hslhsl(70, 95%, 55%)
oklchoklch(0.924 0.214 119.9)
Closest name: Chartreuse (#c1f80a)Relative luminance 0.82

Colors that go with #d5f91f

Blue, Crimson and Red 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 →

#441ff9

#f9b11f · #68f91f

#1fd5f9 · #f91fd5

Split-complementary

Open in tool →

#1f68f9 · #b11ff9

#1ff9b1 · #441ff9 · #f91f68

Contrast

#d5f91f as textRatioAAAA largeAAAFix
Aaon white
1.21:1failfailfail
  • AA: use #687c03 as the text (4.69:1)
  • AAA: use #4f5e02 as the text (7.16:1)
  • AA: or shift the background to #696969 (4.55:1)
  • AAA: or shift the background to #4d4d4d (7:1)
Aaon black
17.4:1passpasspassPasses 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 #d5f91f as the background.

Brands using this color

mcpConnect your agent — build around #d5f91f
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 #d5f91f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/d5f91f-b6bea2-4e7cdf-252d1f-f1efe9?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