Color

#1f2fdb

#1f2fdb
hex#1f2fdb
rgbrgb(31, 47, 219)
hslhsl(235, 75%, 49%)
oklchoklch(0.444 0.251 267.4)
Closest name: Lapis on Neptune (#1f22d2)Relative luminance 0.0744

Colors that go with #1f2fdb

Charcoal, Sea Green 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 →

#dbcb1f

#1f8ddb · #6d1fdb

#db1f2f · #2fdb1f

Split-complementary

Open in tool →

#db6d1f · #8ddb1f

#db1f8d · #dbcb1f · #1fdb6d

Contrast

#1f2fdb as textRatioAAAA largeAAAFix
Aaon white
8.44:1passpasspassPasses AAA — no fix needed.
Aaon black
2.49:1failfailfail
  • AA: use #5e6ae8 as the text (4.7:1)
  • AAA: use #878fee as the text (7.19:1)
  • AA: or shift the background to #bfbfbf (4.59:1)
  • AAA: or shift the background to #ebebeb (7.08:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1f2fdb 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

#1f2fdb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1f2fdb
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 #1f2fdb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1f2fdb-9e9cc4-df8d4e-241f2d-e9eef1?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