Color

#0c23bb

#0c23bb
hex#0c23bb
rgbrgb(12, 35, 187)
hslhsl(232, 88%, 39%)
oklchoklch(0.387 0.229 265.5)
Closest name: Blue Hour (#0034ab)Relative luminance 0.0487

Colors that go with #0c23bb

Charcoal, Crimson and Cornflower Blue lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#bba40c

#0c7bbb · #4c0cbb

#bb0c23 · #23bb0c

Split-complementary

Open in tool →

#bb4c0c · #7bbb0c

#bb0c7b · #bba40c · #0cbb4c

Contrast

#0c23bb as textRatioAAAA largeAAAFix
Aaon white
10.64:1passpasspassPasses AAA — no fix needed.
Aaon black
1.97:1failfailfail
  • AA: use #5268f4 as the text (4.65:1)
  • AAA: use #7e8ef7 as the text (7.1:1)
  • AA: or shift the background to #ababab (4.63:1)
  • AAA: or shift the background to #d4d4d4 (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 #0c23bb 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

#0c23bb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0c23bb
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #0c23bb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0c23bb-9c9dc4-df864e-231f2d-e9eef1?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