Color

#1561ef

#1561ef
hex#1561ef
rgbrgb(21, 97, 239)
hslhsl(219, 87%, 51%)
oklchoklch(0.542 0.225 261.7)
Closest name: Blue Ribbon (#0066ff)Relative luminance 0.1494

Colors that go with #1561ef

Charcoal, Crimson 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 →

#efa315

#15ceef · #3615ef

#ef1561 · #61ef15

Split-complementary

Open in tool →

#ef3615 · #ceef15

#ef15ce · #efa315 · #15ef36

Contrast

#1561ef as textRatioAAAA largeAAAFix
Aaon white
5.27:1passpassfail
  • AAA: use #0e4fc8 as the text (7.07:1)
Aaon black
3.99:1failpassfail
  • AA: use #286ef0 as the text (4.58:1)
  • AAA: use #6295f4 as the text (7.12:1)
  • AA: or shift the background to #f0f0f0 (4.62:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1561ef as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#1561ef reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1561ef
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 #1561ef and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1561ef-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