Color

#1f74db

#1f74db
hex#1f74db
rgbrgb(31, 116, 219)
hslhsl(213, 75%, 49%)
oklchoklch(0.567 0.176 256.3)
Closest name: Royal Blue (#4169e1)Relative luminance 0.179

Colors that go with #1f74db

Charcoal, Crimson and Copper 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 →

#db861f

#1fd1db · #291fdb

#db1f74 · #74db1f

Split-complementary

Open in tool →

#db291f · #d1db1f

#db1fd1 · #db861f · #1fdb29

Contrast

#1f74db as textRatioAAAA largeAAAFix
Aaon white
4.59:1passpassfail
  • AAA: use #1857a5 as the text (7.13:1)
Aaon black
4.58:1passpassfail
  • AAA: use #5a9ae7 as the text (7.21:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1f74db as the background.

Brands using this color

Fonts for this mood

#1f74db reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1f74db
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 #1f74db and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1f74db-9ca9c4-df584e-1f202d-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