brandsweets

Color

#efff5c

#efff5c
hex#efff5c
rgbrgb(239, 255, 92)
hslhsl(66, 100%, 68%)
oklchoklch(0.959 0.182 114.7)
Closest name: Biohazard Suit (#fbfb4c)Relative luminance 0.9064
Vivid
Open in palette toolCheck contrast

Tints & shades

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

Harmonies

Complementary

Open in tool →
efff5c6c5cff

#6c5cff

Analogous

Open in tool →
efff5cffbe5c9dff5c

#ffbe5c · #9dff5c

Triadic

Open in tool →
efff5c5cefffff5cef

#5cefff · #ff5cef

Split-complementary

Open in tool →
efff5c5c9dffbe5cff

#5c9dff · #be5cff

Tetradic

Open in tool →
efff5c5cffbe6c5cffff5c9d

#5cffbe · #6c5cff · #ff5c9d

Contrast

#efff5c as textRatioAAAA largeAAAFix
Aaon white
1.1:1failfailfail
  • AA: use #6e7a00 as the text (4.72:1)
  • AAA: use #535c00 as the text (7.24:1)
  • AA: or shift the background to #707070 (4.51:1)
  • AAA: or shift the background to #525252 (7.12:1)
Aaon black
19.13:1passpasspassPasses 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 #efff5c as the background.

Brands using this color

mcpConnect your agent — build around #efff5c
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 #efff5c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/efff5c-b8bea2-4e86df-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