Color

#1c4bf2

#1c4bf2
hex#1c4bf2
rgbrgb(28, 75, 242)
hslhsl(227, 89%, 53%)
oklchoklch(0.508 0.252 265.1)
Closest name: C64 Blue (#003aff)Relative luminance 0.1169

Colors that go with #1c4bf2

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 →

#f2c41c

#1cb5f2 · #591cf2

#f21c4b · #4bf21c

Split-complementary

Open in tool →

#f2591c · #b5f21c

#f21cb5 · #f2c41c · #1cf259

Contrast

#1c4bf2 as textRatioAAAA largeAAAFix
Aaon white
6.29:1passpassfail
Aaon black
3.34:1failpassfail
  • AA: use #4369f4 as the text (4.57:1)
  • AAA: use #7390f7 as the text (7.06:1)
  • AA: or shift the background to #dbdbdb (4.54:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1c4bf2 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

#1c4bf2 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1c4bf2
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 #1c4bf2 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1c4bf2-9ca0c4-df7a4e-221f2d-e9eff1?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