Color

#03478c

#03478c
hex#03478c
rgbrgb(3, 71, 140)
hslhsl(210, 96%, 28%)
oklchoklch(0.403 0.13 254.9)
Closest name: Cascade Twilight (#234893)Relative luminance 0.0642

Tints & shades

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

Harmonies

Complementary

Open in tool →

#8c4703

#038c8c · #03038c

#8c0347 · #478c03

Split-complementary

Open in tool →

#8c0303 · #8c8c03

#8c038c · #8c4703 · #038c03

Contrast

#03478c as textRatioAAAA largeAAAFix
Aaon white
9.19:1passpasspassPasses AAA — no fix needed.
Aaon black
2.28:1failfailfail
  • AA: use #0573e1 as the text (4.55:1)
  • AAA: use #3799fb as the text (7.11:1)
  • AA: or shift the background to #b8b8b8 (4.64:1)
  • AAA: or shift the background to #e3e3e3 (7.16:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #03478c 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

#03478c reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #03478c
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 #03478c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/03478c-9cabc4-df514e-1f202d-e9f1f1?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