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
#455a63
#455a63
hex
#455a63rgb
rgb(69, 90, 99)hsl
hsl(198, 18%, 33%)oklch
oklch(0.454 0.03 226)Closest name: Arctic Nights (#345c61)Relative luminance 0.0948
Colors that go with #455a63
Blue, Blush Pink and Cadet Blue 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
shipped6 real palettes, including Warp's brand system and Jeep's brand system put Blue beside #455a63, as the supporting colour.
Blush Pink #e8b4b8
shipped4 real palettes, including Nursery and Blush put Blush Pink beside #455a63, as the lead colour.
Cadet Blue #5f9ea0
shippedDesigners have shipped Cadet Blue with #455a63: 4 real palettes, including Dusk and Open House, as the supporting colour.
Copper #b87333
shippedDesigners have shipped Copper with #455a63: 4 real palettes, including Desert Road and Dusk, as the lead colour.
Crimson #dc143c
shippedCrimson is paired with #455a63 in 5 real palettes, including Codecademy's brand system and Gemstone, as the accent.
Dark Goldenrod #b8860b
shipped4 real palettes, including Puma's brand system and Rolex's brand system put Dark Goldenrod beside #455a63, as the supporting colour.
Denim #1560bd
shippedDesigners have shipped Denim with #455a63: 8 real palettes, including HP's brand system and The New York Times's brand system, as the accent.
White Smoke #f5f5f5
neutralWhite Smoke is the near-white surface #455a63 was made for — maximum legibility with no colour cast to argue with.
Real palettes that use #455a63
Tints & shades
Harmonies
Contrast
| #455a63 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 7.25:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.9:1 | 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 #455a63 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 #455a63
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 #455a63 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/455a63-9cb3c4-df4e69-1f232d-e9f1f0?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