Tide Pool
Open in tool →Sea-green and slate with a coral — a literal tide pool: two cool tones, one warm creature.
Color
#252d4b
#252d4b
hex
#252d4brgb
rgb(37, 45, 75)hsl
hsl(227, 34%, 22%)oklch
oklch(0.305 0.055 271.5)Closest name: Deep Sea Base (#2c2c57)Relative luminance 0.0278
Colors that go with #252d4b
Dark Olive Green, Sea Green and Sienna 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.
Dark Olive Green #556b2f
complementaryshippedDark Olive Green sits directly opposite #252d4b on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Sea Green #2e8b57
triadicshippedSea Green completes a triad with #252d4b — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Sienna #a0522d
split-complementshippedSienna is a split-complement of #252d4b: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Slate Blue #6a5acd
analogousshippedSlate Blue is #252d4b's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Steel Blue #4682b4
analogousshippedSteel Blue is #252d4b's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Amber #ffbf00
shippedAmber is paired with #252d4b in 9 real palettes, including Beach Hut and McDonald's's brand system, as the supporting colour.
Blue #0000ff
shipped18 real palettes, including Sketch's brand system and Monzo's brand system put Blue beside #252d4b, as the accent.
White Smoke #f5f5f5
neutralWhite Smoke is the surface for #252d4b: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy.
Real palettes that use #252d4b
Tints & shades
Harmonies
Contrast
| #252d4b as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 13.5:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.56:1 | 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 #252d4b 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
#252d4b reads as cool, muted, dark. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #252d4b
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 #252d4b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/252d4b-9ca0c4-df7a4e-221f2d-e9eff1?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