Color
#428583
#428583rgb(66, 133, 131)hsl(178, 34%, 39%)oklch(0.572 0.068 192.8)Colors that go with #428583
Charcoal, Copper and Champagne 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 #428583: softer than #000 and cool enough to feel like part of the same palette.
Copper #b87333
triadicshippedCopper completes a triad with #428583 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Champagne #f7e7ce
shipped4 real palettes, including Forest Floor and Midnight Luxe put Champagne beside #428583, as that palette's text colour.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #428583: 5 real palettes, including Intel's brand system and Ink & Paper, as the lead colour.
Crimson #dc143c
shippedCrimson is paired with #428583 in 9 real palettes, including Redfin's brand system and Retro Pop, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #428583: 11 real palettes, including Peacock and Campus, as the supporting colour.
Firebrick #b22222
shippedDesigners have shipped Firebrick with #428583: 4 real palettes, including Newsprint and Wendy's's brand system, as the lead colour.
Goldenrod #daa520
shippedGoldenrod shows up next to #428583 in 5 real palettes, including Mid-Century and Sapphire & Gold, as the accent.
Real palettes that use #428583
Tints & shades
Harmonies
Contrast
| #428583 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 4.27:1 | fail | pass | fail | |
Aaon black | 4.91:1 | 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 #428583 as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
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.
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
›analyze #428583 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/428583-a2bcbe-d45999-1f282d-e9f1ed?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