Color

#30aff3

#30aff3
hex#30aff3
rgbrgb(48, 175, 243)
hslhsl(201, 89%, 57%)
oklchoklch(0.717 0.145 238.1)
Closest name: Cerulean (#55aaee)Relative luminance 0.3776

Tints & shades

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

Harmonies

Complementary

Open in tool →

#f37430

#30f3d6 · #304df3

#f330af · #aff330

Split-complementary

Open in tool →

#f3304d · #f3d630

#d630f3 · #f37430 · #4df330

Contrast

#30aff3 as textRatioAAAA largeAAAFix
Aaon white
2.46:1failfailfail
  • AA: use #0b7bb7 as the text (4.63:1)
  • AAA: use #085e8c as the text (7.02:1)
  • AA: or shift the background to #3b3b3b (4.56:1)
  • AAA: or shift the background to #1a1a1a (7.09:1)
Aaon black
8.55:1passpasspassPasses 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 #30aff3 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#30aff3 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #30aff3
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 #30aff3 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/30aff3-9cb1c4-df4e62-1f222d-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