Color

#0b37bc

#0b37bc
hex#0b37bc
rgbrgb(11, 55, 188)
hslhsl(225, 89%, 39%)
oklchoklch(0.417 0.211 264.2)
Closest name: Blue Hour (#0034ab)Relative luminance 0.0643

Tints & shades

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

Harmonies

Complementary

Open in tool →

#bc900b

#0b90bc · #370bbc

#bc0b37 · #37bc0b

Split-complementary

Open in tool →

#bc370b · #90bc0b

#bc0b90 · #bc900b · #0bbc37

Contrast

#0b37bc as textRatioAAAA largeAAAFix
Aaon white
9.18:1passpasspassPasses AAA — no fix needed.
Aaon black
2.29:1failfailfail
  • AA: use #3e6cf4 as the text (4.66:1)
  • AAA: use #7394f7 as the text (7.31:1)
  • AA: or shift the background to #b8b8b8 (4.63:1)
  • 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 #0b37bc 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

#0b37bc reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0b37bc
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 #0b37bc and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0b37bc-9ca1c4-df754e-221f2d-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