Color

#03a657

#03a657
hex#03a657
rgbrgb(3, 166, 87)
hslhsl(151, 96%, 33%)
oklchoklch(0.636 0.164 152.6)
Closest name: Jade (#00a86b)Relative luminance 0.2798

Colors that go with #03a657

Charcoal, Blue and Crimson 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 →

#a50351

#03a506 · #03a2a5

#5703a5 · #a55703

Split-complementary

Open in tool →

#a503a2 · #a50603

#0603a5 · #a50351 · #a2a503

Contrast

#03a657 as textRatioAAAA largeAAAFix
Aaon white
3.18:1failpassfail
  • AA: use #038747 as the text (4.6:1)
  • AAA: use #026435 as the text (7.3:1)
  • AA: or shift the background to #292929 (4.57:1)
Aaon black
6.6:1passpassfail
  • AAA: use #04af5c 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 #03a657 as the background.

Brands using this color

Palettes built around it

mcpConnect your agent — build around #03a657
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 #03a657 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/03a657-a2beb4-d459d0-1f2d2c-e9f1ea?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