Clinic
Open in tool →Teal reads clinical without the coldness of pure blue; the coral accent adds warmth for reassurance moments.
Color
#28728f
#28728f
hex
#28728frgb
rgb(40, 114, 143)hsl
hsl(197, 56%, 36%)oklch
oklch(0.52 0.085 228)Closest name: Astral (#376f89)Relative luminance 0.1447
Colors that go with #28728f
Charcoal, Crimson and Royal Blue 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.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #28728f: softer than #000 and cool enough to feel like part of the same palette.
Crimson #dc143c
split-complementshippedCrimson is a split-complement of #28728f: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Royal Blue #4169e1
analogousshippedRoyal Blue is #28728f's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Sienna #a0522d
complementaryshippedSienna sits directly opposite #28728f on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Amber #ffbf00
shippedAmber is paired with #28728f in 6 real palettes, including Lemon Squeezy's brand system and McDonald's's brand system, as the lead colour.
Blue #0000ff
shipped5 real palettes, including Activision's brand system and Pixar's brand system put Blue beside #28728f, as the accent.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #28728f: 7 real palettes, including Fintech Trust and Glacier, as the lead colour.
Copper #b87333
shippedDesigners have shipped Copper with #28728f: 5 real palettes, including Dusk and Desert Road, as the accent.
Real palettes that use #28728f
Tints & shades
Harmonies
Contrast
| #28728f as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 5.39:1 | pass | pass | fail |
|
Aaon black | 3.89:1 | fail | pass | fail |
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #28728f as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
Palettes built around it
Alpine
Open in tool →Glacier blue with a safety-orange accent: technical outdoor gear, not lifestyle.
Sapphire & Gold
Open in tool →Deep sapphire and gold with a teal — old-money jewel tones on an ivory ground; heraldic without a crest.
Fonts for this mood
#28728f reads as cool, modern. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #28728f
live endpointPoint 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.
endpoint
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt
›analyze #28728f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/28728f-9cb4c4-df4e6b-1f232d-e9f1ef?lock=0&style=vibrantWant the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.
Machine-readable: color.md