Color

#170bef

#170bef
hex#170bef
rgbrgb(23, 11, 239)
hslhsl(243, 91%, 49%)
oklchoklch(0.438 0.292 266.2)
Closest name: Burning Ultrablue (#150aec)Relative luminance 0.0665

Tints & shades

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

Harmonies

Complementary

Open in tool →

#e3ef0b

#0b72ef · #880bef

#ef170b · #0bef17

Split-complementary

Open in tool →

#ef880b · #72ef0b

#ef0b72 · #e3ef0b · #0bef88

Contrast

#170bef as textRatioAAAA largeAAAFix
Aaon white
9.01:1passpasspassPasses AAA — no fix needed.
Aaon black
2.33:1failfailfail
  • AA: use #665ef7 as the text (4.51:1)
  • AAA: use #908af9 as the text (7.19:1)
  • AA: or shift the background to #b8b8b8 (4.54:1)
  • AAA: or shift the background to #e3e3e3 (7.02:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #170bef as the background.

Brands using this color

Fonts for this mood

#170bef reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #170bef
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 #170bef and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/170bef-a39cc4-dfa04e-261f2d-e9edf1?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