Color

#30aefd

#30aefd
hex#30aefd
rgbrgb(48, 174, 253)
hslhsl(203, 98%, 59%)
oklchoklch(0.72 0.156 242.2)
Closest name: Cerulean (#55aaee)Relative luminance 0.3799

Tints & shades

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

Harmonies

Complementary

Open in tool →

#fd7f30

#30fde5 · #3048fd

#fd30ae · #aefd30

Split-complementary

Open in tool →

#fd3048 · #fde530

#e530fd · #fd7f30 · #48fd30

Contrast

#30aefd as textRatioAAAA largeAAAFix
Aaon white
2.44:1failfailfail
  • AA: use #027ac5 as the text (4.57:1)
  • AAA: use #015b92 as the text (7.21:1)
  • AA: or shift the background to #3b3b3b (4.59:1)
  • AAA: or shift the background to #1a1a1a (7.13:1)
Aaon black
8.6:1passpasspassPasses 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 #30aefd as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#30aefd reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #30aefd
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 #30aefd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/30aefd-9cb0c4-df4e5d-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