Color

#19fa42

#19fa42
hex#19fa42
rgbrgb(25, 250, 66)
hslhsl(131, 96%, 54%)
oklchoklch(0.857 0.271 144.3)
Closest name: Cathode Green (#00ff55)Relative luminance 0.6897

Colors that go with #19fa42

Violet, Hot Pink and Plum 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 →

#fa19d1

#60fa19 · #19fab3

#4219fa · #fa4219

Split-complementary

Open in tool →

#b319fa · #fa1960

#1960fa · #fa19d1 · #fab319

Contrast

#19fa42 as textRatioAAAA largeAAAFix
Aaon white
1.42:1failfailfail
  • AA: use #03871b as the text (4.68:1)
  • AAA: use #026414 as the text (7.41:1)
  • AA: or shift the background to #5e5e5e (4.57:1)
  • AAA: or shift the background to #424242 (7.08:1)
Aaon black
14.79:1passpasspassPasses 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 #19fa42 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 #19fa42
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 #19fa42 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/19fa42-a2beaa-b34edf-1f2d28-ecf1e9?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