Color

#124ef3

#124ef3
hex#124ef3
rgbrgb(18, 78, 243)
hslhsl(224, 90%, 51%)
oklchoklch(0.512 0.251 263.9)
Closest name: C64 Blue (#003aff)Relative luminance 0.1205

Tints & shades

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

Harmonies

Complementary

Open in tool →

#f3b712

#12bef3 · #4612f3

#f3124e · #4ef312

Split-complementary

Open in tool →

#f34612 · #bef312

#f312be · #f3b712 · #12f346

Contrast

#124ef3 as textRatioAAAA largeAAAFix
Aaon white
6.16:1passpassfail
  • AAA: use #0c44df as the text (7.22:1)
Aaon black
3.41:1failpassfail
  • AA: use #386bf5 as the text (4.59:1)
  • AAA: use #6e92f7 as the text (7.12:1)
  • AA: or shift the background to #dedede (4.58:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #124ef3 as the background.

Brands using this color

Fonts for this mood

#124ef3 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #124ef3
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 #124ef3 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/124ef3-9ca2c4-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