Color

#1840f2

#1840f2
hex#1840f2
rgbrgb(24, 64, 242)
hslhsl(229, 89%, 52%)
oklchoklch(0.49 0.263 265.4)
Closest name: C64 Blue (#003aff)Relative luminance 0.1027

Colors that go with #1840f2

Charcoal, Crimson 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 →

#f2ca18

#18adf2 · #5d18f2

#f21840 · #40f218

Split-complementary

Open in tool →

#f25d18 · #adf218

#f218ad · #f2ca18 · #18f25d

Contrast

#1840f2 as textRatioAAAA largeAAAFix
Aaon white
6.88:1passpassfail
  • AAA: use #133cf1 as the text (7.13:1)
Aaon black
3.05:1failpassfail
  • AA: use #4867f4 as the text (4.52:1)
  • AAA: use #788ff7 as the text (7.07:1)
  • AA: or shift the background to #d1d1d1 (4.5:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1840f2 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

#1840f2 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1840f2
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 #1840f2 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1840f2-9c9fc4-df7e4e-231f2d-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