Color

#133d90

#133d90
hex#133d90
rgbrgb(19, 61, 144)
hslhsl(220, 77%, 32%)
oklchoklch(0.387 0.145 262)
Closest name: Deep Space Royal (#223382)Relative luminance 0.0549

Colors that go with #133d90

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.

Real palettes that use #133d90

Tints & shades

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

Harmonies

Complementary

Open in tool →

#906713

#137b90 · #281390

#90133d · #3d9013

Split-complementary

Open in tool →

#902813 · #7b9013

#90137b · #906713 · #139028

Contrast

#133d90 as textRatioAAAA largeAAAFix
Aaon white
10.01:1passpasspassPasses AAA — no fix needed.
Aaon black
2.1:1failfailfail
  • AA: use #346fe5 as the text (4.55:1)
  • AAA: use #6a95ec as the text (7.12:1)
  • AA: or shift the background to #b0b0b0 (4.62:1)
  • AAA: or shift the background to #d9d9d9 (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 #133d90 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#133d90 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #133d90
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 #133d90 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/133d90-9ca5c4-df694e-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