Color

#133b86

#133b86
hex#133b86
rgbrgb(19, 59, 134)
hslhsl(219, 75%, 30%)
oklchoklch(0.374 0.134 261.5)
Closest name: Deep Space Royal (#223382)Relative luminance 0.0499

Colors that go with #133b86

Charcoal, Crimson 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.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#865e13

#137586 · #241386

#86133b · #3b8613

Split-complementary

Open in tool →

#862413 · #758613

#861375 · #865e13 · #138624

Contrast

#133b86 as textRatioAAAA largeAAAFix
Aaon white
10.51:1passpasspassPasses AAA — no fix needed.
Aaon black
2:1failfailfail
  • AA: use #326fe2 as the text (4.51:1)
  • AAA: use #6795e9 as the text (7.05:1)
  • AA: or shift the background to #ababab (4.58:1)
  • AAA: or shift the background to #d4d4d4 (7.09:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #133b86 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#133b86 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #133b86
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 #133b86 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/133b86-9ca5c4-df664e-211f2d-e9f0f1?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