Color

#263aba

#263aba
hex#263aba
rgbrgb(38, 58, 186)
hslhsl(232, 66%, 44%)
oklchoklch(0.428 0.2 268.6)
Closest name: Cobalt Blue (#0047ab)Relative luminance 0.0698

Colors that go with #263aba

Charcoal, Sea Green and Steel 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.

Real palettes that use #263aba

Tints & shades

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

Harmonies

Complementary

Open in tool →

#baa726

#2684ba · #5c26ba

#ba263a · #3aba26

Split-complementary

Open in tool →

#ba5c26 · #84ba26

#ba2684 · #baa726 · #26ba5c

Contrast

#263aba as textRatioAAAA largeAAAFix
Aaon white
8.76:1passpasspassPasses AAA — no fix needed.
Aaon black
2.4:1failfailfail
  • AA: use #5a6bdd as the text (4.58:1)
  • AAA: use #8491e6 as the text (7.17:1)
  • AA: or shift the background to #bababa (4.51:1)
  • AAA: or shift the background to #e6e6e6 (7.02:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #263aba 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

#263aba reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #263aba
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 #263aba and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/263aba-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