Color

#5bef0b

#5bef0b
hex#5bef0b
rgbrgb(91, 239, 11)
hslhsl(99, 91%, 49%)
oklchoklch(0.838 0.262 139)
Closest name: Becquerel (#4bec13)Relative luminance 0.6398

Colors that go with #5bef0b

Deep Sky Blue, 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 →

#9f0bef

#cdef0b · #0bef2d

#0b5bef · #ef0b5b

Split-complementary

Open in tool →

#2d0bef · #ef0bcd

#0bcdef · #9f0bef · #ef2d0b

Contrast

#5bef0b as textRatioAAAA largeAAAFix
Aaon white
1.52:1failfailfail
  • AA: use #328406 as the text (4.73:1)
  • AAA: use #276605 as the text (7.03:1)
  • AA: or shift the background to #595959 (4.6:1)
  • AAA: or shift the background to #3d3d3d (7.14:1)
Aaon black
13.8:1passpasspassPasses 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 #5bef0b 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 #5bef0b
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 #5bef0b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/5bef0b-a8bea2-664edf-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