Color

#1e3a8a

#1e3a8a
hex#1e3a8a
rgbrgb(30, 58, 138)
hslhsl(224, 64%, 33%)
oklchoklch(0.379 0.138 265.5)
Closest name: Deep Space Royal (#223382)Relative luminance 0.0514

Colors that go with #1e3a8a

Charcoal, Steel Blue and 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 →

#8a6d1e

#1e718a · #371e8a

#8a1e3b · #3b8a1e

Split-complementary

Open in tool →

#8a371e · #718a1e

#8a1e71 · #8a6d1e · #1e8a37

Contrast

#1e3a8a as textRatioAAAA largeAAAFix
Aaon white
10.36:1passpasspassPasses AAA — no fix needed.
Aaon black
2.03:1failfailfail
  • AA: use #4b71d8 as the text (4.65:1)
  • AAA: use #7995e2 as the text (7.21:1)
  • AA: or shift the background to #ababab (4.51:1)
  • AAA: or shift the background to #d6d6d6 (7.13:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1e3a8a as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#1e3a8a reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1e3a8a
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 #1e3a8a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1e3a8a-9ca2c4-df724e-221f2d-e9eff1?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