Color

#123a97

#123a97
hex#123a97
rgbrgb(18, 58, 151)
hslhsl(222, 79%, 33%)
oklchoklch(0.387 0.159 263.3)
Closest name: Depths of Night (#2c319b)Relative luminance 0.0539

Colors that go with #123a97

Charcoal, Steel Blue and 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 →

#976f12

#127c97 · #2c1297

#97123a · #3a9712

Split-complementary

Open in tool →

#972c12 · #7c9712

#97127c · #976f12 · #12972c

Contrast

#123a97 as textRatioAAAA largeAAAFix
Aaon white
10.11:1passpasspassPasses AAA — no fix needed.
Aaon black
2.08:1failfailfail
  • AA: use #3b6fe8 as the text (4.62:1)
  • AAA: use #6d94ee as the text (7.12:1)
  • AA: or shift the background to #adadad (4.5:1)
  • AAA: or shift the background to #d9d9d9 (7.16:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #123a97 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#123a97 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #123a97
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 #123a97 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/123a97-9ca3c4-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