Color

#378f04

#378f04
hex#378f04
rgbrgb(55, 143, 4)
hslhsl(98, 95%, 29%)
oklchoklch(0.574 0.177 138.4)
Closest name: Emerald (#028f1e)Relative luminance 0.2047

Colors that go with #378f04

Crimson, Royal 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 →

#5d0490

#7d9004 · #049016

#043790 · #900437

Split-complementary

Open in tool →

#160490 · #90047d

#047d90 · #5d0490 · #901604

Contrast

#378f04 as textRatioAAAA largeAAAFix
Aaon white
4.12:1failpassfail
  • AA: use #338603 as the text (4.61:1)
  • AAA: use #266303 as the text (7.32:1)
  • AA: or shift the background to #121212 (4.54:1)
Aaon black
5.09:1passpassfail
  • AAA: use #43ae04 as the text (7.29:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #378f04 as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Fonts for this mood

#378f04 reads as vivid, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #378f04
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 #378f04 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/378f04-a9bea2-644edf-1f2d20-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