Color

#1a20cb

#1a20cb
hex#1a20cb
rgbrgb(26, 32, 203)
hslhsl(238, 77%, 45%)
oklchoklch(0.407 0.246 267.4)
Closest name: Lapis on Neptune (#1f22d2)Relative luminance 0.0556

Colors that go with #1a20cb

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 →

#cbc51a

#1a79cb · #6d1acb

#cb1a20 · #20cb1a

Split-complementary

Open in tool →

#cb6d1a · #79cb1a

#cb1a79 · #cbc51a · #1acb6d

Contrast

#1a20cb as textRatioAAAA largeAAAFix
Aaon white
9.94:1passpasspassPasses AAA — no fix needed.
Aaon black
2.11:1failfailfail
  • AA: use #6166ea as the text (4.6:1)
  • AAA: use #8a8df0 as the text (7.15:1)
  • AA: or shift the background to #b0b0b0 (4.58:1)
  • AAA: or shift the background to #d9d9d9 (7.04:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1a20cb 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

#1a20cb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1a20cb
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 #1a20cb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1a20cb-9f9cc4-df944e-251f2d-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