brandsweets

Color

#21f271

#21f271
hex#21f271
rgbrgb(33, 242, 113)
hslhsl(143, 89%, 54%)
oklchoklch(0.842 0.229 149.3)
Closest name: Emerald Ice Palace (#2af589)Relative luminance 0.6502
Vivid
Open in palette toolCheck contrast

Tints & shades

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

Harmonies

Complementary

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21f271f221a2

#f221a2

Analogous

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21f2713af22121f2da

#3af221 · #21f2da

Triadic

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21f2717121f2f27121

#7121f2 · #f27121

Split-complementary

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21f271da21f2f2213a

#da21f2 · #f2213a

Tetradic

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21f271213af2f221a2f2da21

#213af2 · #f221a2 · #f2da21

Contrast

#21f271 as textRatioAAAA largeAAAFix
Aaon white
1.5:1failfailfail
  • AA: use #088739 as the text (4.63:1)
  • AAA: use #06652a as the text (7.23:1)
  • AA: or shift the background to #595959 (4.67:1)
  • AAA: or shift the background to #3d3d3d (7.24:1)
Aaon black
14:1passpasspassPasses 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 #21f271 as the background.

Brands using this color

mcpConnect your agent — build around #21f271
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 #21f271 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/21f271-a2beb0-c859d4-1f2d2b-eaf1e9?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