Color

#1fa9ff

#1fa9ff
hex#1fa9ff
rgbrgb(31, 169, 255)
hslhsl(203, 100%, 56%)
oklchoklch(0.707 0.166 243.7)
Closest name: Cerulean (#55aaee)Relative luminance 0.3589

Tints & shades

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

Harmonies

Complementary

Open in tool →

#ff751f

#1fffe5 · #1f39ff

#ff1fa9 · #a9ff1f

Split-complementary

Open in tool →

#ff1f39 · #ffe51f

#e51fff · #ff751f · #39ff1f

Contrast

#1fa9ff as textRatioAAAA largeAAAFix
Aaon white
2.57:1failfailfail
  • AA: use #007bc7 as the text (4.51:1)
  • AAA: use #005b94 as the text (7.18:1)
  • AA: or shift the background to #383838 (4.57:1)
  • AAA: or shift the background to #141414 (7.17:1)
Aaon black
8.18:1passpasspassPasses AAA — no fix needed.

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1fa9ff as the background.

Brands using this color

Fonts for this mood

#1fa9ff reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1fa9ff
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 #1fa9ff and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1fa9ff-9cb0c4-df4e5d-1f222d-e9f1f0?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