Color

#03343f

#03343f
hex#03343f
rgbrgb(3, 52, 63)
hslhsl(191, 91%, 13%)
oklchoklch(0.301 0.052 217.5)
Closest name: Nordic Noir (#003344)Relative luminance 0.0283

Tints & shades

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

Harmonies

Complementary

Open in tool →

#3f0e03

#033f2c · #03163f

#3f0334 · #343f03

Split-complementary

Open in tool →

#3f0316 · #3f2c03

#2c033f · #3f0e03 · #163f03

Contrast

#03343f as textRatioAAAA largeAAAFix
Aaon white
13.4:1passpasspassPasses AAA — no fix needed.
Aaon black
1.57:1failfailfail
  • AA: use #07819c as the text (4.63:1)
  • AAA: use #09a5c8 as the text (7.23:1)
  • AA: or shift the background to #969696 (4.53:1)
  • AAA: or shift the background to #bdbdbd (7.13:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #03343f 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

#03343f reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #03343f
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 #03343f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/03343f-a2b6be-df4e7a-1f252d-e9f1ef?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