Color

#0a3f43

#0a3f43
hex#0a3f43
rgbrgb(10, 63, 67)
hslhsl(184, 74%, 15%)
oklchoklch(0.337 0.053 202.7)
Closest name: Rich Black (#004040)Relative luminance 0.0402

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#430e0a

#0a432a · #0a2243

#430a3f · #3f430a

Split-complementary

Open in tool →

#430a22 · #432a0a

#2a0a43 · #430e0a · #22430a

Contrast

#0a3f43 as textRatioAAAA largeAAAFix
Aaon white
11.63:1passpasspassPasses AAA — no fix needed.
Aaon black
1.8:1failfailfail
  • AA: use #15828a as the text (4.59:1)
  • AAA: use #1ba7b1 as the text (7.21:1)
  • AA: or shift the background to #a1a1a1 (4.5:1)
  • AAA: or shift the background to #c9c9c9 (7.03:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0a3f43 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

#0a3f43 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0a3f43
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #0a3f43 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0a3f43-a2b9be-df4e8a-1f262d-e9f1ee?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