Color

#133b4e

#133b4e
hex#133b4e
rgbrgb(19, 59, 78)
hslhsl(199, 61%, 19%)
oklchoklch(0.334 0.055 232.5)
Closest name: Astral Nomad (#203943)Relative luminance 0.0382

Tints & shades

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

Harmonies

Complementary

Open in tool →

#4e2613

#134e43 · #131e4e

#4e133b · #3b4e13

Split-complementary

Open in tool →

#4e131e · #4e4313

#43134e · #4e2613 · #1e4e13

Contrast

#133b4e as textRatioAAAA largeAAAFix
Aaon white
11.91:1passpasspassPasses AAA — no fix needed.
Aaon black
1.76:1failfailfail
  • AA: use #287da4 as the text (4.56:1)
  • AAA: use #3aa0cf as the text (7.11:1)
  • AA: or shift the background to #a1a1a1 (4.61:1)
  • AAA: or shift the background to #c7c7c7 (7.05:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #133b4e 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

#133b4e reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #133b4e
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 #133b4e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/133b4e-9cb3c4-df4e66-1f232d-e9f1f0?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