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
#305f59
#305f59
hex
#305f59rgb
rgb(48, 95, 89)hsl
hsl(172, 33%, 28%)oklch
oklch(0.45 0.053 184.8)Closest name: Iridescent (#3a5b52)Relative luminance 0.0953
Colors that go with #305f59
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 #305f59, as the accent.
Cadet Blue #5f9ea0
shippedDesigners have shipped Cadet Blue with #305f59: 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 #305f59, as the surface under it.
Copper #b87333
shippedDesigners have shipped Copper with #305f59: 4 real palettes, including Desert Road and Clay & Linen, as the lead colour.
Crimson #dc143c
shippedCrimson is paired with #305f59 in 6 real palettes, including Codecademy's brand system and Gemstone, as the accent.
Denim #1560bd
shippedDesigners have shipped Denim with #305f59: 10 real palettes, including HP's brand system and Hinge's brand system, as the accent.
White Smoke #f5f5f5
neutralWhite Smoke is the surface for #305f59: 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 #305f59: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Real palettes that use #305f59
Tints & shades
Harmonies
Contrast
| #305f59 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 7.22:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.91:1 | 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 #305f59 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.
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
#305f59 reads as muted, dark, luxury. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #305f59
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 #305f59 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/305f59-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