brandsweets

Color

#eff637

#eff637
hex#eff637
rgbrgb(239, 246, 55)
hslhsl(62, 91%, 59%)
oklchoklch(0.938 0.194 111.8)
Closest name: Banana Bandanna (#f8f739)Relative luminance 0.8454
Vivid
Open in palette toolCheck contrast

Tints & shades

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

Harmonies

Complementary

Open in tool →
eff6373e37f6

#3e37f6

Analogous

Open in tool →
eff637f69d3790f637

#f69d37 · #90f637

Triadic

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eff63737eff6f637ef

#37eff6 · #f637ef

Split-complementary

Open in tool →
eff6373790f69d37f6

#3790f6 · #9d37f6

Tetradic

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eff63737f69d3e37f6f63790

#37f69d · #3e37f6 · #f63790

Contrast

#eff637 as textRatioAAAA largeAAAFix
Aaon white
1.17:1failfailfail
  • AA: use #767a06 as the text (4.61:1)
  • AAA: use #555804 as the text (7.54:1)
  • AA: or shift the background to #6b6b6b (4.54:1)
  • AAA: or shift the background to #4d4d4d (7.21:1)
Aaon black
17.91:1passpasspassPasses 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 #eff637 as the background.

Brands using this color

mcpConnect your agent — build around #eff637
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 #eff637 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/eff637-babea2-4e8fdf-272d1f-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