Color

#54d421

#54d421
hex#54d421
rgbrgb(84, 212, 33)
hslhsl(103, 73%, 48%)
oklchoklch(0.768 0.232 139.2)
Closest name: Blinking Terminal (#66cc00)Relative luminance 0.4908

Colors that go with #54d421

Taupe, Violet and Hot Pink lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#a121d4

#add421 · #21d448

#2154d4 · #d42154

Split-complementary

Open in tool →

#4821d4 · #d421ad

#21add4 · #a121d4 · #d44821

Contrast

#54d421 as textRatioAAAA largeAAAFix
Aaon white
1.94:1failfailfail
  • AA: use #348415 as the text (4.71:1)
  • AAA: use #286510 as the text (7.1:1)
  • AA: or shift the background to #4a4a4a (4.56:1)
  • AAA: or shift the background to #2b2b2b (7.29:1)
Aaon black
10.82:1passpasspassPasses 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 #54d421 as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

mcpConnect your agent — build around #54d421
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #54d421 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/54d421-a6bea2-704edf-1f2d21-eff1e9?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