Color

#0b0f51

#0b0f51
hex#0b0f51
rgbrgb(11, 15, 81)
hslhsl(237, 76%, 18%)
oklchoklch(0.226 0.116 270.1)
Closest name: Interstellar Blue (#001155)Relative luminance 0.0101

Tints & shades

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

Harmonies

Complementary

Open in tool →

#514d0b

#0b3151 · #2a0b51

#510b0f · #0f510b

Split-complementary

Open in tool →

#512a0b · #31510b

#510b31 · #514d0b · #0b512a

Contrast

#0b0f51 as textRatioAAAA largeAAAFix
Aaon white
17.48:1passpasspassPasses AAA — no fix needed.
Aaon black
1.2:1failfailfail
  • AA: use #6269ea as the text (4.73:1)
  • AAA: use #8a8fef as the text (7.26:1)
  • AA: or shift the background to #828282 (4.55:1)
  • AAA: or shift the background to #a6a6a6 (7.18:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0b0f51 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

#0b0f51 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0b0f51
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 #0b0f51 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0b0f51-9f9cc4-df924e-251f2d-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