Color

#399103

#399103
hex#399103
rgbrgb(57, 145, 3)
hslhsl(97, 96%, 29%)
oklchoklch(0.58 0.179 138.2)
Closest name: Emerald (#028f1e)Relative luminance 0.2113

Colors that go with #399103

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 →

#5b0391

#809103 · #039114

#033991 · #910339

Split-complementary

Open in tool →

#140391 · #910380

#038091 · #5b0391 · #911403

Contrast

#399103 as textRatioAAAA largeAAAFix
Aaon white
4.02:1failpassfail
  • AA: use #358703 as the text (4.55:1)
  • AAA: use #286402 as the text (7.21:1)
  • AA: or shift the background to #141414 (4.58:1)
Aaon black
5.23:1passpassfail
  • AAA: use #45af04 as the text (7.39:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #399103 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

#399103 reads as vivid, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #399103
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 #399103 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/399103-a9bea2-624edf-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