Color

#135dfb

#135dfb
hex#135dfb
rgbrgb(19, 93, 251)
hslhsl(221, 97%, 53%)
oklchoklch(0.545 0.245 262.7)
Closest name: Blue Ribbon (#0066ff)Relative luminance 0.1493

Tints & shades

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

Harmonies

Complementary

Open in tool →

#fbb213

#13d1fb · #3e13fb

#fb135d · #5dfb13

Split-complementary

Open in tool →

#fb3e13 · #d1fb13

#fb13d1 · #fbb213 · #13fb3e

Contrast

#135dfb as textRatioAAAA largeAAAFix
Aaon white
5.27:1passpassfail
  • AAA: use #0348dd as the text (7.06:1)
Aaon black
3.99:1failpassfail
  • AA: use #276afc as the text (4.55:1)
  • AAA: use #6394fd as the text (7.18:1)
  • AA: or shift the background to #f0f0f0 (4.62:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #135dfb as the background.

Brands using this color

Fonts for this mood

#135dfb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #135dfb
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 #135dfb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/135dfb-9ca4c4-df6b4e-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