Color

#10337f

#10337f
hex#10337f
rgbrgb(16, 51, 127)
hslhsl(221, 78%, 28%)
oklchoklch(0.349 0.135 262.8)
Closest name: Below the Surface (#0a2f7c)Relative luminance 0.0401

Tints & shades

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

Harmonies

Complementary

Open in tool →

#7f5c10

#106b7f · #24107f

#7f1033 · #337f10

Split-complementary

Open in tool →

#7f2410 · #6b7f10

#7f106b · #7f5c10 · #107f24

Contrast

#10337f as textRatioAAAA largeAAAFix
Aaon white
11.65:1passpasspassPasses AAA — no fix needed.
Aaon black
1.8:1failfailfail
  • AA: use #376fe6 as the text (4.58:1)
  • AAA: use #6e96ed as the text (7.25:1)
  • AA: or shift the background to #a1a1a1 (4.51:1)
  • AAA: or shift the background to #c9c9c9 (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 #10337f 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

#10337f reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #10337f
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 #10337f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/10337f-9ca4c4-df6b4e-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