brandsweets

Color

#efef3e

#efef3e
hex#efef3e
rgbrgb(239, 239, 62)
hslhsl(60, 85%, 59%)
oklchoklch(0.923 0.184 109.5)
Closest name: Buttercup Glow (#f1f458)Relative luminance 0.8043
Vivid
Open in palette toolCheck contrast

Tints & shades

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

Harmonies

Complementary

Open in tool →
efef3e3e3eef

#3e3eef

Analogous

Open in tool →
efef3eef963e96ef3e

#ef963e · #96ef3e

Triadic

Open in tool →
efef3e3eefefef3eef

#3eefef · #ef3eef

Split-complementary

Open in tool →
efef3e3e96ef963eef

#3e96ef · #963eef

Tetradic

Open in tool →
efef3e3eef963e3eefef3e96

#3eef96 · #3e3eef · #ef3e96

Contrast

#efef3e as textRatioAAAA largeAAAFix
Aaon white
1.23:1failfailfail
  • AA: use #76760a as the text (4.81:1)
  • AAA: use #5a5a07 as the text (7.24:1)
  • AA: or shift the background to #666666 (4.67:1)
  • AAA: or shift the background to #4a4a4a (7.21:1)
Aaon black
17.09:1passpasspassPasses 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 #efef3e as the background.

Brands using this color

mcpConnect your agent — build around #efef3e
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 #efef3e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/efef3e-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