Color

#58c421

#58c421
hex#58c421
rgbrgb(88, 196, 33)
hslhsl(100, 71%, 45%)
oklchoklch(0.728 0.213 138)
Closest name: Frog (#58bc08)Relative luminance 0.4166

Colors that go with #58c421

Blue, Charcoal and Royal Blue 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 →

#8e21c4

#a9c421 · #21c43c

#2158c4 · #c42158

Split-complementary

Open in tool →

#3c21c4 · #c421a9

#21a9c4 · #8e21c4 · #c43c21

Contrast

#58c421 as textRatioAAAA largeAAAFix
Aaon white
2.25:1failfailfail
  • AA: use #3a8316 as the text (4.73:1)
  • AAA: use #2d6411 as the text (7.14:1)
  • AA: or shift the background to #404040 (4.61:1)
  • AAA: or shift the background to #212121 (7.16:1)
Aaon black
9.33:1passpasspassPasses 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 #58c421 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 #58c421
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 #58c421 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/58c421-a8bea2-694edf-1f2d21-f0f1e9?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