Color

#3f784e

#3f784e
hex#3f784e
rgbrgb(63, 120, 78)
hslhsl(136, 31%, 36%)
oklchoklch(0.522 0.09 150.8)
Closest name: Amazon (#387b54)Relative luminance 0.1504

Colors that go with #3f784e

Charcoal, Royal Blue and Medium Violet Red 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 →

#783f69

#4d783f · #3f786b

#4f3f78 · #784f3f

Split-complementary

Open in tool →

#6b3f78 · #783f4d

#3f4d78 · #783f69 · #786b3f

Contrast

#3f784e as textRatioAAAA largeAAAFix
Aaon white
5.24:1passpassfail
  • AAA: use #33613f as the text (7.19:1)
Aaon black
4.01:1failpassfail
  • AA: use #458255 as the text (4.58:1)
  • AAA: use #58a76d as the text (7.16:1)
  • AA: or shift the background to #f0f0f0 (4.6:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3f784e as the background.

Brands using this color

mcpConnect your agent — build around #3f784e
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 #3f784e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3f784e-a2bead-b959d4-1f2d29-ebf1e9?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