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
#375d51
#375d51
hex
#375d51rgb
rgb(55, 93, 81)hsl
hsl(161, 26%, 29%)oklch
oklch(0.446 0.048 171.9)Closest name: Iridescent (#3a5b52)Relative luminance 0.0924
Colors that go with #375d51
Blue, Cadet Blue 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.
Blue #0000ff
shipped4 real palettes, including Rolex's brand system and Warp's brand system put Blue beside #375d51, as the accent.
Cadet Blue #5f9ea0
shippedDesigners have shipped Cadet Blue with #375d51: 4 real palettes, including Paper & Pine and Alpine, as the supporting colour.
Champagne #f7e7ce
shipped4 real palettes, including Darkroom and BrandSweets's brand system put Champagne beside #375d51, as the surface under it.
Copper #b87333
shippedDesigners have shipped Copper with #375d51: 4 real palettes, including Desert Road and Clay & Linen, as the lead colour.
Crimson #dc143c
shippedCrimson is paired with #375d51 in 5 real palettes, including Codecademy's brand system and Gemstone, as the accent.
Denim #1560bd
shippedDesigners have shipped Denim with #375d51: 9 real palettes, including HP's brand system and Hinge's brand system, as the accent.
White Smoke #f5f5f5
neutralWhite Smoke is the surface for #375d51: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy.
Rose Gold #b76e79
complementaryRose Gold sits directly opposite #375d51 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Real palettes that use #375d51
Tints & shades
Harmonies
Contrast
| #375d51 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 7.38:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.85:1 | 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 #375d51 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
#375d51 reads as muted, dark, luxury. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #375d51
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 #375d51 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/375d51-a2beb8-d459bb-1f2c2d-e9f1eb?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