Color

#03404f

#03404f
hex#03404f
rgbrgb(3, 64, 79)
hslhsl(192, 93%, 16%)
oklchoklch(0.344 0.061 220.3)
Closest name: Cold and Dark (#154250)Relative luminance 0.0425

Tints & shades

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

Harmonies

Complementary

Open in tool →

#4f1203

#034f38 · #031a4f

#4f0340 · #404f03

Split-complementary

Open in tool →

#4f031a · #4f3803

#38034f · #4f1203 · #1a4f03

Contrast

#03404f as textRatioAAAA largeAAAFix
Aaon white
11.35:1passpasspassPasses AAA — no fix needed.
Aaon black
1.85:1failfailfail
  • AA: use #067f9d as the text (4.53:1)
  • AAA: use #07a3ca as the text (7.1:1)
  • AA: or shift the background to #a6a6a6 (4.66:1)
  • AAA: or shift the background to #cccccc (7.07:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #03404f 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

#03404f reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #03404f
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 #03404f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/03404f-a2b5be-df4e77-1f242d-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