Color

#5b901d

#5b901d
hex#5b901d
rgbrgb(91, 144, 29)
hslhsl(88, 66%, 34%)
oklchoklch(0.594 0.152 131.9)
Closest name: Asparagus Sultan (#6a8e22)Relative luminance 0.2226

Colors that go with #5b901d

Crimson, Blue and Charcoal 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 →

#531d90

#908c1d · #21901d

#1d5b90 · #901d5b

Split-complementary

Open in tool →

#1d2190 · #8c1d90

#1d908c · #531d90 · #901d21

Contrast

#5b901d as textRatioAAAA largeAAAFix
Aaon white
3.85:1failpassfail
  • AA: use #53831b as the text (4.54:1)
  • AAA: use #3d6114 as the text (7.2:1)
  • AA: or shift the background to #1a1a1a (4.52:1)
Aaon black
5.45:1passpassfail
  • AAA: use #6aa923 as the text (7.31:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #5b901d 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 #5b901d
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 #5b901d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/5b901d-aebea2-4e51df-212d1f-f1f1e9?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