Color

#104df4

#104df4
hex#104df4
rgbrgb(16, 77, 244)
hslhsl(224, 91%, 51%)
oklchoklch(0.511 0.254 263.8)
Closest name: C64 Blue (#003aff)Relative luminance 0.1195

Tints & shades

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

Harmonies

Complementary

Open in tool →

#f4b710

#10bff4 · #4510f4

#f4104d · #4df410

Split-complementary

Open in tool →

#f44510 · #bff410

#f410bf · #f4b710 · #10f445

Contrast

#104df4 as textRatioAAAA largeAAAFix
Aaon white
6.19:1passpassfail
  • AAA: use #0b45e5 as the text (7.01:1)
Aaon black
3.39:1failpassfail
  • AA: use #376af6 as the text (4.55:1)
  • AAA: use #6d92f8 as the text (7.12:1)
  • AA: or shift the background to #dedede (4.6:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #104df4 as the background.

Brands using this color

Fonts for this mood

#104df4 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #104df4
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 #104df4 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/104df4-9ca2c4-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