Color

#100dce

#100dce
hex#100dce
rgbrgb(16, 13, 206)
hslhsl(241, 88%, 43%)
oklchoklch(0.394 0.26 265.9)
Closest name: mediumblue (#0000cd)Relative luminance 0.0485

Colors that go with #100dce

Charcoal, Cornflower Blue and Crimson 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 →

#cbce0d

#0d6ace · #710dce

#ce100d · #0dce10

Split-complementary

Open in tool →

#ce710d · #6ace0d

#ce0d6a · #cbce0d · #0dce71

Contrast

#100dce as textRatioAAAA largeAAAFix
Aaon white
10.66:1passpasspassPasses AAA — no fix needed.
Aaon black
1.97:1failfailfail
  • AA: use #6361f5 as the text (4.56:1)
  • AAA: use #8e8cf8 as the text (7.26:1)
  • AA: or shift the background to #ababab (4.64:1)
  • AAA: or shift the background to #d4d4d4 (7.19:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #100dce as the background.

Brands using this color

Fonts for this mood

#100dce reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #100dce
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 #100dce and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/100dce-a19cc4-df9b4e-261f2d-e9edf1?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