Color

#455fb5

#455fb5
hex#455fb5
rgbrgb(69, 95, 181)
hslhsl(226, 45%, 49%)
oklchoklch(0.51 0.139 268.5)
Closest name: Blasphemous Blue (#3356aa)Relative luminance 0.1279

Colors that go with #455fb5

Charcoal, Sea Green and Amber 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 →

#b59b45

#4597b5 · #6345b5

#b5455f · #5fb545

Split-complementary

Open in tool →

#b56345 · #97b545

#b54597 · #b59b45 · #45b563

Contrast

#455fb5 as textRatioAAAA largeAAAFix
Aaon white
5.9:1passpassfail
  • AAA: use #3c539f as the text (7.17:1)
Aaon black
3.56:1failpassfail
  • AA: use #5971c0 as the text (4.55:1)
  • AAA: use #8193cf as the text (7.01:1)
  • AA: or shift the background to #e3e3e3 (4.6:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #455fb5 as the background.

Brands using this color

Fonts for this mood

#455fb5 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #455fb5
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 #455fb5 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/455fb5-9ca1c4-df774e-221f2d-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