Color

#151a38

#151a38
hex#151a38
rgbrgb(21, 26, 56)
hslhsl(231, 45%, 15%)
oklchoklch(0.231 0.058 273.9)
Closest name: Nightwalker (#161d3b)Relative luminance 0.0118

Colors that go with #151a38

Charcoal, Dark Olive Green and Sea Green 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 →

#373215

#152b37 · #211537

#37151a · #1a3715

Split-complementary

Open in tool →

#372115 · #2b3715

#37152b · #373215 · #153721

Contrast

#151a38 as textRatioAAAA largeAAAFix
Aaon white
16.98:1passpasspassPasses AAA — no fix needed.
Aaon black
1.24:1failfailfail
  • AA: use #606fc3 as the text (4.56:1)
  • AAA: use #8994d2 as the text (7.23:1)
  • AA: or shift the background to #858585 (4.6:1)
  • AAA: or shift the background to #a8a8a8 (7.14:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #151a38 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#151a38 reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #151a38
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 #151a38 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/151a38-9c9ec4-df834e-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