Color

#123c97

#123c97
hex#123c97
rgbrgb(18, 60, 151)
hslhsl(221, 79%, 33%)
oklchoklch(0.391 0.156 262.8)
Closest name: Depths of Night (#2c319b)Relative luminance 0.0559

Colors that go with #123c97

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 →

#976d12

#127e97 · #2a1297

#97123c · #3c9712

Split-complementary

Open in tool →

#972a12 · #7e9712

#97127e · #976d12 · #12972a

Contrast

#123c97 as textRatioAAAA largeAAAFix
Aaon white
9.91:1passpasspassPasses AAA — no fix needed.
Aaon black
2.12:1failfailfail
  • AA: use #366ee7 as the text (4.54:1)
  • AAA: use #6d96ee as the text (7.25:1)
  • AA: or shift the background to #b0b0b0 (4.57:1)
  • AAA: or shift the background to #d9d9d9 (7.02:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #123c97 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#123c97 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #123c97
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 #123c97 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/123c97-9ca4c4-df6b4e-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