Color

#1e4da4

#1e4da4
hex#1e4da4
rgbrgb(30, 77, 164)
hslhsl(219, 69%, 38%)
oklchoklch(0.441 0.15 261.4)
Closest name: Cobalt Blue (#0047ab)Relative luminance 0.0826

Colors that go with #1e4da4

Charcoal, Steel Blue and Amber 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 →

#a4751e

#1e90a4 · #321ea4

#a41e4d · #4da41e

Split-complementary

Open in tool →

#a4321e · #90a41e

#a41e90 · #a4751e · #1ea432

Contrast

#1e4da4 as textRatioAAAA largeAAAFix
Aaon white
7.92:1passpasspassPasses AAA — no fix needed.
Aaon black
2.65:1failfailfail
  • AA: use #3971db as the text (4.56:1)
  • AAA: use #6c96e4 as the text (7.12:1)
  • AA: or shift the background to #c4c4c4 (4.54:1)
  • AAA: or shift the background to #f2f2f2 (7.07:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1e4da4 as the background.

Brands using this color

Fonts for this mood

#1e4da4 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1e4da4
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 #1e4da4 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1e4da4-9ca5c4-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