Bookshop
Open in tool →Chestnut and forest on cream read like a cloth-bound spine; the palette recedes so covers and type do the talking.
Color
#215e56
#215e56
hex
#215e56rgb
rgb(33, 94, 86)hsl
hsl(172, 48%, 25%)oklch
oklch(0.44 0.064 183.3)Closest name: Mosque (#005f5b)Relative luminance 0.09
Colors that go with #215e56
Blue, Cadet Blue and Copper 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.
Blue #0000ff
shipped4 real palettes, including Rolex's brand system and Warp's brand system put Blue beside #215e56, as the accent.
Cadet Blue #5f9ea0
shippedDesigners have shipped Cadet Blue with #215e56: 4 real palettes, including Paper & Pine and Alpine, as the supporting colour.
Copper #b87333
shippedDesigners have shipped Copper with #215e56: 4 real palettes, including Desert Road and Clay & Linen, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #215e56: 6 real palettes, including HP's brand system and Hinge's brand system, as the accent.
Goldenrod #daa520
shippedGoldenrod shows up next to #215e56 in 5 real palettes, including Fireside and Mid-Century, as the accent.
Midnight Blue #191970
shipped5 real palettes, including Lufthansa's brand system and Open House put Midnight Blue beside #215e56, as the lead colour.
White Smoke #f5f5f5
neutralWhite Smoke is the surface for #215e56: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy.
Rust #b7410e
split-complementshippedRust is a split-complement of #215e56: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Real palettes that use #215e56
Tints & shades
Harmonies
Contrast
| #215e56 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 7.5:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.8:1 | fail | fail | fail |
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #215e56 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
#215e56 reads as dark, luxury, bold. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #215e56
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 #215e56 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/215e56-a2bebe-d459a5-1f292d-e9f1ec?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