brandsweets

Color

#eff934

#eff934
hex#eff934
rgbrgb(239, 249, 52)
hslhsl(63, 94%, 59%)
oklchoklch(0.944 0.198 112.7)
Closest name: Banana Bandanna (#f8f739)Relative luminance 0.8635
Vivid
Open in palette toolCheck contrast

Tints & shades

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

Harmonies

Complementary

Open in tool →
eff9343e34f9

#3e34f9

Analogous

Open in tool →
eff934f9a0348df934

#f9a034 · #8df934

Triadic

Open in tool →
eff93434eff9f934ef

#34eff9 · #f934ef

Split-complementary

Open in tool →
eff934348df9a034f9

#348df9 · #a034f9

Tetradic

Open in tool →
eff93434f9a03e34f9f9348d

#34f9a0 · #3e34f9 · #f9348d

Contrast

#eff934 as textRatioAAAA largeAAAFix
Aaon white
1.15:1failfailfail
  • AA: use #767c04 as the text (4.51:1)
  • AAA: use #555903 as the text (7.46:1)
  • AA: or shift the background to #6b6b6b (4.64:1)
  • AAA: or shift the background to #4f4f4f (7.13:1)
Aaon black
18.27:1passpasspassPasses 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 #eff934 as the background.

Brands using this color

mcpConnect your agent — build around #eff934
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 #eff934 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/eff934-b9bea2-4e8ddf-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