Color

#2a43c0

#2a43c0
hex#2a43c0
rgbrgb(42, 67, 192)
hslhsl(230, 64%, 46%)
oklchoklch(0.451 0.196 268.2)
Closest name: Cobalt Blue (#0047ab)Relative luminance 0.0831

Colors that go with #2a43c0

Charcoal, Sea Green and Steel 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 →

#c0a72a

#2a8ec0 · #5c2ac0

#c02a43 · #43c02a

Split-complementary

Open in tool →

#c05c2a · #8ec02a

#c02a8e · #c0a72a · #2ac05c

Contrast

#2a43c0 as textRatioAAAA largeAAAFix
Aaon white
7.89:1passpasspassPasses AAA — no fix needed.
Aaon black
2.66:1failfailfail
  • AA: use #586dda as the text (4.61:1)
  • AAA: use #8292e3 as the text (7.17:1)
  • AA: or shift the background to #c4c4c4 (4.52:1)
  • AAA: or shift the background to #f2f2f2 (7.05:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #2a43c0 as the background.

Brands using this color

Fonts for this mood

#2a43c0 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2a43c0
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 #2a43c0 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2a43c0-9c9ec4-df814e-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