Color

#151c7e

#151c7e
hex#151c7e
rgbrgb(21, 28, 126)
hslhsl(236, 71%, 29%)
oklchoklch(0.307 0.16 269.5)
Closest name: midnightblue (#191970)Relative luminance 0.025

Tints & shades

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

Harmonies

Complementary

Open in tool →

#7e7715

#15517e · #43157e

#7e151c · #1c7e15

Split-complementary

Open in tool →

#7e4315 · #517e15

#7e1551 · #7e7715 · #157e43

Contrast

#151c7e as textRatioAAAA largeAAAFix
Aaon white
14.01:1passpasspassPasses AAA — no fix needed.
Aaon black
1.5:1failfailfail
  • AA: use #5e67e4 as the text (4.54:1)
  • AAA: use #8990eb as the text (7.25:1)
  • AA: or shift the background to #949494 (4.62:1)
  • AAA: or shift the background to #b8b8b8 (7.06:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #151c7e as the background.

Brands using this color

Fonts for this mood

#151c7e reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #151c7e
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 #151c7e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/151c7e-9e9cc4-df8f4e-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