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.
Color
#43555b
#43555b
hex
#43555brgb
rgb(67, 85, 91)hsl
hsl(195, 15%, 31%)oklch
oklch(0.437 0.024 220.1)Closest name: All Nighter (#455454)Relative luminance 0.0845
Colors that go with #43555b
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 #43555b: 4 real palettes, including Paper & Pine and Dusk, as the supporting colour.
Copper #b87333
shippedDesigners have shipped Copper with #43555b: 4 real palettes, including Desert Road and Dusk, as the lead colour.
Crimson #dc143c
shippedCrimson is paired with #43555b in 4 real palettes, including Codecademy's brand system and Gemstone, as the accent.
Denim #1560bd
shippedDesigners have shipped Denim with #43555b: 7 real palettes, including HP's brand system and Hinge's brand system, as the accent.
Goldenrod #daa520
shippedGoldenrod shows up next to #43555b in 4 real palettes, including Fireside and Mid-Century, as the accent.
Medium Sea Green #3cb371
shippedMedium Sea Green is paired with #43555b in 5 real palettes, including Console Light and Mint Modern, as the accent.
Midnight Blue #191970
shipped6 real palettes, including First Snow and Microsoft's brand system put Midnight Blue beside #43555b, as that palette's text colour.
White Smoke #f5f5f5
neutralWhite Smoke is the near-white surface #43555b was made for — maximum legibility with no colour cast to argue with.
Real palettes that use #43555b
Tints & shades
Harmonies
Contrast
| #43555b as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 7.81:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.69:1 | 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 #43555b 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
mcpConnect your agent — build around #43555b
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 #43555b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/43555b-9cb5c4-df4e70-1f242d-e9f1ef?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