Color

#31da0b

#31da0b
hex#31da0b
rgbrgb(49, 218, 11)
hslhsl(109, 90%, 45%)
oklchoklch(0.774 0.254 141.4)
Closest name: Alarming Slime (#2ce335)Relative luminance 0.5082

Colors that go with #31da0b

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 →

#b40bda

#99da0b · #0bda4d

#0b31da · #da0b31

Split-complementary

Open in tool →

#4d0bda · #da0b99

#0b99da · #b40bda · #da4d0b

Contrast

#31da0b as textRatioAAAA largeAAAFix
Aaon white
1.88:1failfailfail
  • AA: use #1f8807 as the text (4.58:1)
  • AAA: use #176605 as the text (7.14:1)
  • AA: or shift the background to #4a4a4a (4.71:1)
  • AAA: or shift the background to #303030 (7.02:1)
Aaon black
11.16:1passpasspassPasses 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 #31da0b 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 #31da0b
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 #31da0b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/31da0b-a4bea2-7e4edf-1f2d23-eef1e9?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