Color

#28a3c8

#28a3c8
hex#28a3c8
rgbrgb(40, 163, 200)
hslhsl(194, 67%, 47%)
oklchoklch(0.667 0.115 223.5)
Closest name: Blue Ocean (#009dc4)Relative luminance 0.3082

Colors that go with #28a3c8

Charcoal, Tomato and Amber lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Real palettes that use #28a3c8

Tints & shades

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

Harmonies

Complementary

Open in tool →

#c84d28

#28c89d · #2852c8

#c828a3 · #a3c828

Split-complementary

Open in tool →

#c82852 · #c89d28

#9d28c8 · #c84d28 · #52c828

Contrast

#28a3c8 as textRatioAAAA largeAAAFix
Aaon white
2.93:1failfailfail
  • AA: use #1f809e as the text (4.53:1)
  • AAA: use #175d73 as the text (7.37:1)
  • AA: or shift the background to #303030 (4.5:1)
  • AAA: or shift the background to #030303 (7.04:1)
Aaon black
7.16:1passpasspassPasses 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 #28a3c8 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#28a3c8 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #28a3c8
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #28a3c8 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/28a3c8-9cb6c4-df4e72-1f242d-e9f1ef?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