Color

#1f55ea

#1f55ea
hex#1f55ea
rgbrgb(31, 85, 234)
hslhsl(224, 83%, 52%)
oklchoklch(0.518 0.231 264.2)
Closest name: Blue Ribbon (#0066ff)Relative luminance 0.1273

Tints & shades

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

Harmonies

Complementary

Open in tool →

#eab41f

#1fbbea · #4e1fea

#ea1f55 · #55ea1f

Split-complementary

Open in tool →

#ea4e1f · #bbea1f

#ea1fbb · #eab41f · #1fea4e

Contrast

#1f55ea as textRatioAAAA largeAAAFix
Aaon white
5.92:1passpassfail
  • AAA: use #1448d7 as the text (7.15:1)
Aaon black
3.55:1failpassfail
  • AA: use #406eed as the text (4.67:1)
  • AAA: use #7395f2 as the text (7.31:1)
  • AA: or shift the background to #e3e3e3 (4.61:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1f55ea as the background.

Brands using this color

Fonts for this mood

#1f55ea reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1f55ea
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 #1f55ea and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1f55ea-9ca2c4-df724e-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