Color

#0337ba

#0337ba
hex#0337ba
rgbrgb(3, 55, 186)
hslhsl(223, 97%, 37%)
oklchoklch(0.413 0.21 263.4)
Closest name: Blue Hour (#0034ab)Relative luminance 0.063

Tints & shades

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

Harmonies

Complementary

Open in tool →

#ba8603

#0392ba · #2a03ba

#ba0337 · #37ba03

Split-complementary

Open in tool →

#ba2a03 · #92ba03

#ba0392 · #ba8603 · #03ba2a

Contrast

#0337ba as textRatioAAAA largeAAAFix
Aaon white
9.29:1passpasspassPasses AAA — no fix needed.
Aaon black
2.26:1failfailfail
  • AA: use #316bfc as the text (4.64:1)
  • AAA: use #6892fd as the text (7.12:1)
  • AA: or shift the background to #b5b5b5 (4.53:1)
  • AAA: or shift the background to #e0e0e0 (7.04:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0337ba 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

#0337ba reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0337ba
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 #0337ba and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0337ba-9ca3c4-df704e-211f2d-e9eff1?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