brandsweets

Color

#f3fc45

#f3fc45
hex#f3fc45
rgbrgb(243, 252, 69)
hslhsl(63, 97%, 63%)
oklchoklch(0.954 0.192 112.4)
Closest name: Biohazard Suit (#fbfb4c)Relative luminance 0.8911
Vivid
Open in palette toolCheck contrast

Tints & shades

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

Harmonies

Complementary

Open in tool →
f3fc454e45fc

#4e45fc

Analogous

Open in tool →
f3fc45fcaa4597fc45

#fcaa45 · #97fc45

Triadic

Open in tool →
f3fc4545f3fcfc45f3

#45f3fc · #fc45f3

Split-complementary

Open in tool →
f3fc454597fcaa45fc

#4597fc · #aa45fc

Tetradic

Open in tool →
f3fc4545fcaa4e45fcfc4597

#45fcaa · #4e45fc · #fc4597

Contrast

#f3fc45 as textRatioAAAA largeAAAFix
Aaon white
1.12:1failfailfail
  • AA: use #737902 as the text (4.7:1)
  • AAA: use #565a01 as the text (7.35:1)
  • AA: or shift the background to #6e6e6e (4.57:1)
  • AAA: or shift the background to #525252 (7:1)
Aaon black
18.82:1passpasspassPasses 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 #f3fc45 as the background.

Brands using this color

mcpConnect your agent — build around #f3fc45
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 #f3fc45 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/f3fc45-b9bea2-4e8ddf-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