Color

#103cc1

#103cc1
hex#103cc1
rgbrgb(16, 60, 193)
hslhsl(225, 85%, 41%)
oklchoklch(0.431 0.211 264.3)
Closest name: Cobalt Blue (#0047ab)Relative luminance 0.0719

Colors that go with #103cc1

Charcoal, Steel Blue 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 →

#c19510

#1095c1 · #3c10c1

#c1103c · #3cc110

Split-complementary

Open in tool →

#c13c10 · #95c110

#c11095 · #c19510 · #10c13c

Contrast

#103cc1 as textRatioAAAA largeAAAFix
Aaon white
8.61:1passpasspassPasses AAA — no fix needed.
Aaon black
2.44:1failfailfail
  • AA: use #3e6aef as the text (4.51:1)
  • AAA: use #7192f4 as the text (7.12:1)
  • AA: or shift the background to #bdbdbd (4.58:1)
  • AAA: or shift the background to #e8e8e8 (7.03:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #103cc1 as the background.

Brands using this color

Fonts for this mood

#103cc1 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #103cc1
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 #103cc1 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/103cc1-9ca1c4-df754e-221f2d-e9eff1?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