Color

#398e5b

#398e5b
hex#398e5b
rgbrgb(57, 142, 91)
hslhsl(144, 43%, 39%)
oklchoklch(0.581 0.114 154.2)
Closest name: seagreen (#2e8b57)Relative luminance 0.2097

Colors that go with #398e5b

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 →

#8e396c

#418e39 · #398e86

#5b398e · #8e5b39

Split-complementary

Open in tool →

#86398e · #8e3941

#39418e · #8e396c · #8e8639

Contrast

#398e5b as textRatioAAAA largeAAAFix
Aaon white
4.04:1failpassfail
  • AA: use #348354 as the text (4.65:1)
  • AAA: use #27623f as the text (7.23:1)
  • AA: or shift the background to #141414 (4.56:1)
Aaon black
5.19:1passpassfail
  • AAA: use #43a86b as the text (7.05:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #398e5b 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 #398e5b
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 #398e5b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/398e5b-a2beb0-ca59d4-1f2d2b-eaf1e9?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