Color

#1d10cb

#1d10cb
hex#1d10cb
rgbrgb(29, 16, 203)
hslhsl(244, 85%, 43%)
oklchoklch(0.396 0.253 268.2)
Closest name: Lapis on Neptune (#1f22d2)Relative luminance 0.0494

Colors that go with #1d10cb

Charcoal, Crimson and Cornflower Blue 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 →

#becb10

#1061cb · #7a10cb

#cb1d10 · #10cb1d

Split-complementary

Open in tool →

#cb7a10 · #61cb10

#cb1061 · #becb10 · #10cb7a

Contrast

#1d10cb as textRatioAAAA largeAAAFix
Aaon white
10.56:1passpasspassPasses AAA — no fix needed.
Aaon black
1.99:1failfailfail
  • AA: use #685ff2 as the text (4.51:1)
  • AAA: use #9089f5 as the text (7.08:1)
  • AA: or shift the background to #ababab (4.6:1)
  • AAA: or shift the background to #d4d4d4 (7.12:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1d10cb as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Fonts for this mood

#1d10cb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1d10cb
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 #1d10cb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1d10cb-a39cc4-dfa24e-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