brandsweets

Color

#ffff3d

#ffff3d
hex#ffff3d
rgbrgb(255, 255, 61)
hslhsl(60, 100%, 62%)
oklchoklch(0.97 0.196 109.6)
Closest name: Big Yellow Taxi (#ffff33)Relative luminance 0.9312
Vivid
Open in palette toolCheck contrast

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →
ffff3d3d3dff

#3d3dff

Analogous

Open in tool →
ffff3dff9e3d9eff3d

#ff9e3d · #9eff3d

Triadic

Open in tool →
ffff3d3dffffff3dff

#3dffff · #ff3dff

Split-complementary

Open in tool →
ffff3d3d9eff9e3dff

#3d9eff · #9e3dff

Tetradic

Open in tool →
ffff3d3dff9e3d3dffff3d9e

#3dff9e · #3d3dff · #ff3d9e

Contrast

#ffff3d as textRatioAAAA largeAAAFix
Aaon white
1.07:1failfailfail
  • AA: use #7a7a00 as the text (4.55:1)
  • AAA: use #5c5c00 as the text (7.03:1)
  • AA: or shift the background to #707070 (4.63:1)
  • AAA: or shift the background to #545454 (7.08:1)
Aaon black
19.62:1passpasspassPasses 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 #ffff3d as the background.

Brands using this color

mcpConnect your agent — build around #ffff3d
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

›analyze #ffff3d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/ffff3d-bbbea2-4e94df-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