Color

#151f79

#151f79
hex#151f79
rgbrgb(21, 31, 121)
hslhsl(234, 70%, 28%)
oklchoklch(0.306 0.15 269.3)
Closest name: midnightblue (#191970)Relative luminance 0.0252

Tints & shades

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

Harmonies

Complementary

Open in tool →

#796f15

#155179 · #3d1579

#79151f · #1f7915

Split-complementary

Open in tool →

#793d15 · #517915

#791551 · #796f15 · #15793d

Contrast

#151f79 as textRatioAAAA largeAAAFix
Aaon white
13.96:1passpasspassPasses AAA — no fix needed.
Aaon black
1.5:1failfailfail
  • AA: use #5a68e2 as the text (4.51:1)
  • AAA: use #8690ea as the text (7.19:1)
  • AA: or shift the background to #949494 (4.6:1)
  • AAA: or shift the background to #b8b8b8 (7.04:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #151f79 as the background.

Brands using this color

Fonts for this mood

#151f79 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #151f79
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 #151f79 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/151f79-9d9cc4-df8a4e-241f2d-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