Color
#21873c
#21873crgb(33, 135, 60)hsl(136, 61%, 33%)oklch(0.549 0.144 147.8)Colors that go with #21873c
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 body-text near-black for #21873c: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy.
Crimson #dc143c
triadicshippedCrimson completes a triad with #21873c — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Royal Blue #4169e1
triadicshippedRoyal Blue completes a triad with #21873c — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Dark Orchid #9932cc
complementaryshippedDark Orchid sits directly opposite #21873c on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Denim #1560bd
shippedDesigners have shipped Denim with #21873c: 6 real palettes, including Xbox's brand system and Intel's brand system, as the supporting colour.
Midnight Blue #191970
shipped4 real palettes, including Paramount+'s brand system and Telehealth put Midnight Blue beside #21873c, as the supporting colour.
Taupe #483c32
shippedTaupe is paired with #21873c in 10 real palettes, including Acer's brand system and Instacart's brand system, as that palette's text colour.
Blue Violet #8a2be2
split-complementshippedBlue Violet is a split-complement of #21873c: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Real palettes that use #21873c
Tints & shades
Harmonies
Contrast
| #21873c as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 4.57:1 | pass | pass | fail |
|
Aaon black | 4.6:1 | 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 #21873c as the background.
Brands using this color
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 #21873c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/21873c-a2bead-b959d4-1f2d29-ebf1e9?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