Rain Garden
Open in tool →Wet-leaf teal and moss with a soft peach — an overcast spring, calmer than the bright version and better for long reading.
Color
#428b8f
#428b8f
hex
#428b8frgb
rgb(66, 139, 143)hsl
hsl(183, 37%, 41%)oklch
oklch(0.592 0.073 200.2)Closest name: Highlands (#449084)Relative luminance 0.2161
Colors that go with #428b8f
Charcoal, Copper and Cobalt 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 #428b8f: softer than #000 and cool enough to feel like part of the same palette.
Copper #b87333
split-complementshippedCopper is a split-complement of #428b8f: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #428b8f: 5 real palettes, including Intel's brand system and Ink & Paper, as the lead colour.
Crimson #dc143c
shippedCrimson is paired with #428b8f in 9 real palettes, including Redfin's brand system and Diner, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #428b8f: 13 real palettes, including Peacock and Campus, as the supporting colour.
Firebrick #b22222
shippedDesigners have shipped Firebrick with #428b8f: 4 real palettes, including Wendy's's brand system and Newsprint, as the supporting colour.
Goldenrod #daa520
shippedGoldenrod shows up next to #428b8f in 5 real palettes, including Ledger Dark and Sapphire & Gold, as the lead colour.
Midnight Blue #191970
shipped10 real palettes, including Tide Pool and Ford's brand system put Midnight Blue beside #428b8f, as that palette's text colour.
Real palettes that use #428b8f
Tints & shades
Harmonies
Contrast
| #428b8f as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 3.95:1 | fail | pass | fail | |
Aaon black | 5.32:1 | pass | 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 #428b8f 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
Fonts for this mood
#428b8f reads as cool, modern. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #428b8f
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 #428b8f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/428b8f-a2b9be-d4598e-1f262d-e9f1ee?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