Color

#0a42db

#0a42db
hex#0a42db
rgbrgb(10, 66, 219)
hslhsl(224, 91%, 45%)
oklchoklch(0.467 0.237 263.8)
Closest name: Brutally Blue (#0022dd)Relative luminance 0.0908

Tints & shades

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

Harmonies

Complementary

Open in tool →

#dba30a

#0aaadb · #3b0adb

#db0a42 · #42db0a

Split-complementary

Open in tool →

#db3b0a · #aadb0a

#db0aaa · #dba30a · #0adb3b

Contrast

#0a42db as textRatioAAAA largeAAAFix
Aaon white
7.46:1passpasspassPasses AAA — no fix needed.
Aaon black
2.82:1failfailfail
  • AA: use #376af6 as the text (4.55:1)
  • AAA: use #6d92f8 as the text (7.12:1)
  • AA: or shift the background to #c9c9c9 (4.5:1)
  • AAA: or shift the background to #fafafa (7.15:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0a42db 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

#0a42db reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0a42db
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 #0a42db and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0a42db-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