Color

#128cd3

#128cd3
hex#128cd3
rgbrgb(18, 140, 211)
hslhsl(202, 84%, 45%)
oklchoklch(0.615 0.144 242.8)
Closest name: Blue Jay (#5588dd)Relative luminance 0.2359

Tints & shades

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

Harmonies

Complementary

Open in tool →

#d35912

#12d3b9 · #122cd3

#d3128c · #8cd312

Split-complementary

Open in tool →

#d3122c · #d3b912

#b912d3 · #d35912 · #2cd312

Contrast

#128cd3 as textRatioAAAA largeAAAFix
Aaon white
3.67:1failpassfail
  • AA: use #107ab7 as the text (4.68:1)
  • AAA: use #0c5b88 as the text (7.32:1)
  • AA: or shift the background to #1c1c1c (4.64:1)
Aaon black
5.72:1passpassfail
  • AAA: use #199eeb as the text (7.13:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #128cd3 as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Fonts for this mood

#128cd3 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #128cd3
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 #128cd3 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/128cd3-9cb1c4-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