Color

#1d5aaa

#1d5aaa
hex#1d5aaa
rgbrgb(29, 90, 170)
hslhsl(214, 71%, 39%)
oklchoklch(0.475 0.142 257)
Closest name: Blasphemous Blue (#3356aa)Relative luminance 0.1048

Tints & shades

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

Harmonies

Complementary

Open in tool →

#aa6d1d

#1da1aa · #261daa

#aa1d5a · #5aaa1d

Split-complementary

Open in tool →

#aa261d · #a1aa1d

#aa1da1 · #aa6d1d · #1daa26

Contrast

#1d5aaa as textRatioAAAA largeAAAFix
Aaon white
6.78:1passpassfail
  • AAA: use #1c58a6 as the text (7.01:1)
Aaon black
3.1:1failpassfail
  • AA: use #2573da as the text (4.54:1)
  • AAA: use #5e98e4 as the text (7.09:1)
  • AA: or shift the background to #d4d4d4 (4.58:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1d5aaa as the background.

Brands using this color

Fonts for this mood

#1d5aaa reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1d5aaa
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 #1d5aaa and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1d5aaa-9ca9c4-df5a4e-1f1f2d-e9f0f1?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