brandsweets

Color

#ecf40b

#ecf40b
hex#ecf40b
rgbrgb(236, 244, 11)
hslhsl(62, 91%, 50%)
oklchoklch(0.93 0.205 112.2)
Closest name: Banana Bandanna (#f8f739)Relative luminance 0.8256
Vivid
Open in palette toolCheck contrast

Tints & shades

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

Harmonies

Complementary

Open in tool →
ecf40b130bf4

#130bf4

Analogous

Open in tool →
ecf40bf4870b78f40b

#f4870b · #78f40b

Triadic

Open in tool →
ecf40b0becf4f40bec

#0becf4 · #f40bec

Split-complementary

Open in tool →
ecf40b0b78f4870bf4

#0b78f4 · #870bf4

Tetradic

Open in tool →
ecf40b0bf487130bf4f40b78

#0bf487 · #130bf4 · #f40b78

Contrast

#ecf40b as textRatioAAAA largeAAAFix
Aaon white
1.2:1failfailfail
  • AA: use #767a06 as the text (4.61:1)
  • AAA: use #555804 as the text (7.54:1)
  • AA: or shift the background to #696969 (4.58:1)
  • AAA: or shift the background to #4d4d4d (7.05:1)
Aaon black
17.51:1passpasspassPasses 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 #ecf40b as the background.

Brands using this color

mcpConnect your agent — build around #ecf40b
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 #ecf40b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/ecf40b-babea2-4e8fdf-272d1f-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