Color

#151dbc

#151dbc
hex#151dbc
rgbrgb(21, 29, 188)
hslhsl(237, 80%, 41%)
oklchoklch(0.384 0.232 267)
Closest name: mediumblue (#0000cd)Relative luminance 0.0467

Tints & shades

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

Harmonies

Complementary

Open in tool →

#bcb415

#1571bc · #6015bc

#bc151d · #1dbc15

Split-complementary

Open in tool →

#bc6015 · #71bc15

#bc1571 · #bcb415 · #15bc60

Contrast

#151dbc as textRatioAAAA largeAAAFix
Aaon white
10.86:1passpasspassPasses AAA — no fix needed.
Aaon black
1.93:1failfailfail
  • AA: use #5e65ed as the text (4.56:1)
  • AAA: use #888df2 as the text (7.14:1)
  • AA: or shift the background to #a8a8a8 (4.57:1)
  • AAA: or shift the background to #d1d1d1 (7.11:1)

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

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Fonts for this mood

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

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

tool url/palettes/new/151dbc-9f9cc4-df924e-251f2d-e9edf1?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