Color

#1fa3ef

#1fa3ef
hex#1fa3ef
rgbrgb(31, 163, 239)
hslhsl(202, 87%, 53%)
oklchoklch(0.685 0.153 241.5)
Closest name: Fresh Blue of Bel Air (#069af3)Relative luminance 0.3272

Tints & shades

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

Harmonies

Complementary

Open in tool →

#ef6b1f

#1fefd4 · #1f3bef

#ef1fa3 · #a3ef1f

Split-complementary

Open in tool →

#ef1f3b · #efd41f

#d41fef · #ef6b1f · #3bef1f

Contrast

#1fa3ef as textRatioAAAA largeAAAFix
Aaon white
2.78:1failfailfail
  • AA: use #0d7bba as the text (4.61:1)
  • AAA: use #0a5b8a as the text (7.3:1)
  • AA: or shift the background to #333333 (4.54:1)
  • AAA: or shift the background to #0a0a0a (7.11:1)
Aaon black
7.54:1passpasspassPasses 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 #1fa3ef as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#1fa3ef reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1fa3ef
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 #1fa3ef and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1fa3ef-9cb1c4-df4e5f-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