Color

#1248b5

#1248b5
hex#1248b5
rgbrgb(18, 72, 181)
hslhsl(220, 82%, 39%)
oklchoklch(0.442 0.182 262.2)
Closest name: Cobalt Blue (#0047ab)Relative luminance 0.081

Colors that go with #1248b5

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 →

#b57f12

#129ab5 · #2d12b5

#b51248 · #48b512

Split-complementary

Open in tool →

#b52d12 · #9ab512

#b5129a · #b57f12 · #12b52d

Contrast

#1248b5 as textRatioAAAA largeAAAFix
Aaon white
8.02:1passpasspassPasses AAA — no fix needed.
Aaon black
2.62:1failfailfail
  • AA: use #3370eb as the text (4.66:1)
  • AAA: use #6694f0 as the text (7.06:1)
  • AA: or shift the background to #c2c2c2 (4.5:1)
  • AAA: or shift the background to #f0f0f0 (7.03:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1248b5 as the background.

Brands using this color

Fonts for this mood

#1248b5 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1248b5
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 #1248b5 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1248b5-9ca5c4-df694e-211f2d-e9f0f1?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