Color

#151f37

#151f37
hex#151f37
rgbrgb(21, 31, 55)
hslhsl(222, 45%, 15%)
oklchoklch(0.243 0.048 265.8)
Closest name: Nightwalker (#161d3b)Relative luminance 0.0142

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#372d15

#153137 · #1c1537

#37151f · #1f3715

Split-complementary

Open in tool →

#371c15 · #313715

#371531 · #372d15 · #15371c

Contrast

#151f37 as textRatioAAAA largeAAAFix
Aaon white
16.37:1passpasspassPasses AAA — no fix needed.
Aaon black
1.28:1failfailfail
  • AA: use #5575be as the text (4.67:1)
  • AAA: use #7e96ce as the text (7.14:1)
  • AA: or shift the background to #878787 (4.56:1)
  • AAA: or shift the background to #ababab (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 #151f37 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#151f37 reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #151f37
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #151f37 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/151f37-9ca3c4-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