Color

#1245ba

#1245ba
hex#1245ba
rgbrgb(18, 69, 186)
hslhsl(222, 82%, 40%)
oklchoklch(0.441 0.192 263.1)
Closest name: Cobalt Blue (#0047ab)Relative luminance 0.0793

Colors that go with #1245ba

Charcoal, Crimson 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 →

#ba8712

#1298ba · #3412ba

#ba1245 · #45ba12

Split-complementary

Open in tool →

#ba3412 · #98ba12

#ba1298 · #ba8712 · #12ba34

Contrast

#1245ba as textRatioAAAA largeAAAFix
Aaon white
8.12:1passpasspassPasses AAA — no fix needed.
Aaon black
2.59:1failfailfail
  • AA: use #376deb as the text (4.55:1)
  • AAA: use #6a93f0 as the text (7.04:1)
  • AA: or shift the background to #c2c2c2 (4.56:1)
  • AAA: or shift the background to #f0f0f0 (7.13:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1245ba as the background.

Brands using this color

Fonts for this mood

#1245ba reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1245ba
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 #1245ba and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1245ba-9ca3c4-df6e4e-211f2d-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