brandsweets

Color

#effd53

#effd53
hex#effd53
rgbrgb(239, 253, 83)
hslhsl(65, 98%, 66%)
oklchoklch(0.954 0.186 114)
Closest name: Biohazard Suit (#fbfb4c)Relative luminance 0.8923
Vivid
Open in palette toolCheck contrast

Tints & shades

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

Harmonies

Complementary

Open in tool →
effd536153fd

#6153fd

Analogous

Open in tool →
effd53fdb6539afd53

#fdb653 · #9afd53

Triadic

Open in tool →
effd5353effdfd53ef

#53effd · #fd53ef

Split-complementary

Open in tool →
effd53539afdb653fd

#539afd · #b653fd

Tetradic

Open in tool →
effd5353fdb66153fdfd539a

#53fdb6 · #6153fd · #fd539a

Contrast

#effd53 as textRatioAAAA largeAAAFix
Aaon white
1.11:1failfailfail
  • AA: use #6f7901 as the text (4.76:1)
  • AAA: use #535b01 as the text (7.33:1)
  • AA: or shift the background to #6e6e6e (4.58:1)
  • AAA: or shift the background to #525252 (7.01:1)
Aaon black
18.85:1passpasspassPasses 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 #effd53 as the background.

Brands using this color

mcpConnect your agent — build around #effd53
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 #effd53 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/effd53-b8bea2-4e88df-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