Color

#0b00a3

#0b00a3
hex#0b00a3
rgbrgb(11, 0, 163)
hslhsl(244, 100%, 32%)
oklchoklch(0.326 0.222 266)
Closest name: Cobalt (#030aa7)Relative luminance 0.0272

Tints & shades

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

Harmonies

Complementary

Open in tool →

#98a300

#0047a3 · #5c00a3

#a30b00 · #00a30b

Split-complementary

Open in tool →

#a35c00 · #47a300

#a30047 · #98a300 · #00a35c

Contrast

#0b00a3 as textRatioAAAA largeAAAFix
Aaon white
13.61:1passpasspassPasses AAA — no fix needed.
Aaon black
1.54:1failfailfail
  • AA: use #675cff as the text (4.55:1)
  • AAA: use #928aff as the text (7.3:1)
  • AA: or shift the background to #969696 (4.6:1)
  • AAA: or shift the background to #bababa (7.01:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0b00a3 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

#0b00a3 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0b00a3
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 #0b00a3 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0b00a3-a39cc4-dfa24e-261f2d-e9edf1?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