Color

#135eb4

#135eb4
hex#135eb4
rgbrgb(19, 94, 180)
hslhsl(212, 81%, 39%)
oklchoklch(0.489 0.153 255.8)
Closest name: Denim (#1560bd)Relative luminance 0.1144

Colors that go with #135eb4

Charcoal, Crimson and Sienna lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#b46913

#13afb4 · #1813b4

#b4135e · #5eb413

Split-complementary

Open in tool →

#b41813 · #afb413

#b413af · #b46913 · #13b418

Contrast

#135eb4 as textRatioAAAA largeAAAFix
Aaon white
6.39:1passpassfail
  • AAA: use #1157a6 as the text (7.15:1)
Aaon black
3.29:1failpassfail
  • AA: use #1774de as the text (4.59:1)
  • AAA: use #5099ed as the text (7.12:1)
  • AA: or shift the background to #d9d9d9 (4.53:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #135eb4 as the background.

Brands using this color

Fonts for this mood

#135eb4 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #135eb4
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #135eb4 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/135eb4-9caac4-df564e-1f202d-e9f1f1?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