Color

#1850aa

#1850aa
hex#1850aa
rgbrgb(24, 80, 170)
hslhsl(217, 75%, 38%)
oklchoklch(0.451 0.156 259.9)
Closest name: Cobalt Blue (#0047ab)Relative luminance 0.0883

Colors that go with #1850aa

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.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#aa7218

#1899aa · #2918aa

#aa1850 · #50aa18

Split-complementary

Open in tool →

#aa2918 · #99aa18

#aa1899 · #aa7218 · #18aa29

Contrast

#1850aa as textRatioAAAA largeAAAFix
Aaon white
7.59:1passpasspassPasses AAA — no fix needed.
Aaon black
2.77:1failfailfail
  • AA: use #2d72e1 as the text (4.61:1)
  • AAA: use #6396e9 as the text (7.07:1)
  • AA: or shift the background to #c9c9c9 (4.58:1)
  • AAA: or shift the background to #f7f7f7 (7.08:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1850aa as the background.

Brands using this color

Fonts for this mood

#1850aa reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1850aa
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 #1850aa and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1850aa-9ca7c4-df624e-201f2d-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