Color

#1d74aa

#1d74aa
hex#1d74aa
rgbrgb(29, 116, 170)
hslhsl(203, 71%, 39%)
oklchoklch(0.536 0.115 241.9)
Closest name: Brilliant Blue (#0075b3)Relative luminance 0.1565

Colors that go with #1d74aa

Charcoal, Rust and Sienna 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 →

#aa531d

#1daa9a · #1d2daa

#aa1d74 · #74aa1d

Split-complementary

Open in tool →

#aa1d2d · #aa9a1d

#9a1daa · #aa531d · #2daa1d

Contrast

#1d74aa as textRatioAAAA largeAAAFix
Aaon white
5.08:1passpassfail
  • AAA: use #175c87 as the text (7.2:1)
Aaon black
4.13:1failpassfail
  • AA: use #1f7db7 as the text (4.68:1)
  • AAA: use #369ddd as the text (7.02:1)
  • AA: or shift the background to #f2f2f2 (4.54:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1d74aa as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#1d74aa reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1d74aa
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 #1d74aa and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1d74aa-9cb0c4-df4e5d-1f222d-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