Color

#78d459

#78d459
hex#78d459
rgbrgb(120, 212, 89)
hslhsl(105, 59%, 59%)
oklchoklch(0.786 0.183 138.6)
Closest name: yellowgreen (#9acd32)Relative luminance 0.518

Colors that go with #78d459

Charcoal, Taupe and Violet 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 →

#b559d4

#b5d459 · #59d478

#5978d4 · #d45978

Split-complementary

Open in tool →

#7859d4 · #d459b5

#59b5d4 · #b559d4 · #d47859

Contrast

#78d459 as textRatioAAAA largeAAAFix
Aaon white
1.85:1failfailfail
  • AA: use #3b8623 as the text (4.55:1)
  • AAA: use #2d651a as the text (7.03:1)
  • AA: or shift the background to #4d4d4d (4.57:1)
  • AAA: or shift the background to #303030 (7.14:1)
Aaon black
11.36:1passpasspassPasses 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 #78d459 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 #78d459
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 #78d459 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/78d459-a6bea2-754edf-1f2d22-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