brandsweets

Color

#efef15

#efef15
hex#efef15
rgbrgb(239, 239, 21)
hslhsl(60, 87%, 51%)
oklchoklch(0.922 0.198 109.7)
Closest name: Banana Bombshell (#f7e82e)Relative luminance 0.8014
Vivid
Open in palette toolCheck contrast

Tints & shades

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

Harmonies

Complementary

Open in tool →
efef151515ef

#1515ef

Analogous

Open in tool →
efef15ef821582ef15

#ef8215 · #82ef15

Triadic

Open in tool →
efef1515efefef15ef

#15efef · #ef15ef

Split-complementary

Open in tool →
efef151582ef8215ef

#1582ef · #8215ef

Tetradic

Open in tool →
efef1515ef821515efef1582

#15ef82 · #1515ef · #ef1582

Contrast

#efef15 as textRatioAAAA largeAAAFix
Aaon white
1.23:1failfailfail
  • AA: use #777708 as the text (4.74:1)
  • AAA: use #5b5b06 as the text (7.13:1)
  • AA: or shift the background to #666666 (4.66:1)
  • AAA: or shift the background to #4a4a4a (7.19:1)
Aaon black
17.03:1passpasspassPasses 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 #efef15 as the background.

Brands using this color

mcpConnect your agent — build around #efef15
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 #efef15 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/efef15-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