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
#375c57
#375c57
hex
#375c57rgb
rgb(55, 92, 87)hsl
hsl(172, 25%, 29%)oklch
oklch(0.445 0.043 184.9)Closest name: Iridescent (#3a5b52)Relative luminance 0.0915
Colors that go with #375c57
Cadet Blue, Copper and Crimson 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.
Cadet Blue #5f9ea0
shippedDesigners have shipped Cadet Blue with #375c57: 4 real palettes, including Paper & Pine and Alpine, as the supporting colour.
Copper #b87333
shippedDesigners have shipped Copper with #375c57: 4 real palettes, including Desert Road and Clay & Linen, as the lead colour.
Crimson #dc143c
shippedCrimson is paired with #375c57 in 4 real palettes, including Codecademy's brand system and Gemstone, as the accent.
Denim #1560bd
shippedDesigners have shipped Denim with #375c57: 7 real palettes, including HP's brand system and Hinge's brand system, as the accent.
Goldenrod #daa520
shippedGoldenrod shows up next to #375c57 in 4 real palettes, including Fireside and Mid-Century, as the accent.
Medium Sea Green #3cb371
shippedMedium Sea Green is paired with #375c57 in 5 real palettes, including Console Light and Undergrowth, as the accent.
White Smoke #f5f5f5
neutralWhite Smoke is the surface for #375c57: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy.
Sienna #a0522d
split-complementshippedSienna is a split-complement of #375c57: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Real palettes that use #375c57
Tints & shades
Harmonies
Contrast
| #375c57 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 7.42:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.83:1 | 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 #375c57 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
Desert Road
Open in tool →Sandstone and sand with a deep teal — the one cool note makes the warm colours look intentional rather than beige.
Darkroom
Open in tool →Sepia, faded ochre and a teal shadow on aged paper — the photograph-in-a-drawer palette, tuned so it still passes AA.
Fireside
Open in tool →Cranberry, pine and brass on a charcoal night — the holiday palette without the clichés, because the surface is cold.
Fonts for this mood
#375c57 reads as muted, dark, luxury. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #375c57
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 #375c57 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/375c57-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