Color
#21783b
#21783brgb(33, 120, 59)hsl(138, 57%, 30%)oklch(0.507 0.125 149.3)Colors that go with #21783b
Charcoal, Crimson and Dark Orchid 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 #21783b: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy.
Crimson #dc143c
triadicshippedCrimson completes a triad with #21783b — 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 #21783b on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Blue #0000ff
shipped4 real palettes, including Warp's brand system and Kia's brand system put Blue beside #21783b, as the supporting colour.
Copper #b87333
shippedDesigners have shipped Copper with #21783b: 4 real palettes, including Clay & Linen and Wellness, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #21783b: 6 real palettes, including Xbox's brand system and Intel's brand system, as the supporting colour.
Royal Blue #4169e1
triadicshippedRoyal Blue completes a triad with #21783b — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Sage Green #9caf88
shippedDesigners have shipped Sage Green with #21783b: 4 real palettes, including Olive Grove and Pine & Birch, as the supporting colour.
Real palettes that use #21783b
Tints & shades
Harmonies
Contrast
| #21783b as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 5.51:1 | pass | pass | fail |
|
Aaon black | 3.81:1 | 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 #21783b as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
Fonts for this mood
#21783b reads as dark, luxury, bold. The font library is tagged with the same vocabulary:
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 #21783b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/21783b-a2beae-be59d4-1f2d29-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