Color

#1c6bb5

#1c6bb5
hex#1c6bb5
rgbrgb(28, 107, 181)
hslhsl(209, 73%, 41%)
oklchoklch(0.521 0.138 251.5)
Closest name: Brilliant Blue (#0075b3)Relative luminance 0.141

Colors that go with #1c6bb5

Charcoal, Crimson 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 →

#b5661c

#1cb5b2 · #1c1fb5

#b51c6b · #6bb51c

Split-complementary

Open in tool →

#b51c1f · #b5b21c

#b21cb5 · #b5661c · #1fb51c

Contrast

#1c6bb5 as textRatioAAAA largeAAAFix
Aaon white
5.5:1passpassfail
  • AAA: use #175996 as the text (7.23:1)
Aaon black
3.82:1failpassfail
  • AA: use #2078cb as the text (4.61:1)
  • AAA: use #4f9be3 as the text (7.13:1)
  • AA: or shift the background to #ebebeb (4.61:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1c6bb5 as the background.

Brands using this color

Fonts for this mood

#1c6bb5 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1c6bb5
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 #1c6bb5 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1c6bb5-9cacc4-df4e4e-1f212d-e9f1f1?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