Color

#274fa5

#274fa5
hex#274fa5
rgbrgb(39, 79, 165)
hslhsl(221, 62%, 40%)
oklchoklch(0.45 0.146 263.1)
Closest name: Blasphemous Blue (#3356aa)Relative luminance 0.0874

Tints & shades

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

Harmonies

Complementary

Open in tool →

#a57d27

#278ea5 · #3e27a5

#a5274f · #4fa527

Split-complementary

Open in tool →

#a53e27 · #8ea527

#a5278e · #a57d27 · #27a53e

Contrast

#274fa5 as textRatioAAAA largeAAAFix
Aaon white
7.64:1passpasspassPasses AAA — no fix needed.
Aaon black
2.75:1failfailfail
  • AA: use #4572d3 as the text (4.6:1)
  • AAA: use #7395de as the text (7.08:1)
  • AA: or shift the background to #c7c7c7 (4.52:1)
  • AAA: or shift the background to #f5f5f5 (7.01:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #274fa5 as the background.

Brands using this color

Fonts for this mood

#274fa5 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #274fa5
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 #274fa5 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/274fa5-9ca4c4-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