Color

#31a503

#31a503
hex#31a503
rgbrgb(49, 165, 3)
hslhsl(103, 96%, 33%)
oklchoklch(0.632 0.203 140.1)
Closest name: Always Greener Grass (#11aa00)Relative luminance 0.2757

Colors that go with #31a503

Blue, Dodger Blue and Taupe 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 →

#7703a5

#82a503 · #03a526

#0331a5 · #a50331

Split-complementary

Open in tool →

#2603a5 · #a50382

#0382a5 · #7703a5 · #a52603

Contrast

#31a503 as textRatioAAAA largeAAAFix
Aaon white
3.22:1failpassfail
  • AA: use #288703 as the text (4.61:1)
  • AAA: use #1e6402 as the text (7.29:1)
  • AA: or shift the background to #292929 (4.51:1)
Aaon black
6.51:1passpassfail
  • AAA: use #34af04 as the text (7.28:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #31a503 as the background.

Brands using this color

mcpConnect your agent — build around #31a503
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 #31a503 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/31a503-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