Tide Pool
Open in tool →Sea-green and slate with a coral — a literal tide pool: two cool tones, one warm creature.
Color
#303445
#303445
hex
#303445rgb
rgb(48, 52, 69)hsl
hsl(229, 18%, 23%)oklch
oklch(0.329 0.031 274.3)Closest name: After Midnight (#38393f)Relative luminance 0.0351
Colors that go with #303445
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 #303445 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 #303445 — 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 #303445: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Slate Blue #6a5acd
analogousshippedSlate Blue is #303445'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 #303445'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 #303445 in 8 real palettes, including Beach Hut and McDonald's's brand system, as the supporting colour.
Blue #0000ff
shipped14 real palettes, including Minecraft's brand system and Dunkin''s brand system put Blue beside #303445, as the accent.
White Smoke #f5f5f5
neutralWhite Smoke is the surface for #303445: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy.
Real palettes that use #303445
Tints & shades
Harmonies
Contrast
| #303445 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 12.33:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.7:1 | 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 #303445 as the background.
Brands using this color
- Mercuryprimary · #323341 · Δ0.736
- Dockerprimary · #2c333f · Δ1.3
- Audiprimary · #2c343f · Δ1.319
- Bloombergsecondary · #2b333f · Δ1.402
- Hermèsaccent · #2b333f · Δ1.402
- PlayStation® Official Site: Consoles, Games, Accessories & MoreSony Interactive Entertainmentsecondary · #2b333f · Δ1.402
- Boeingprimary · #253746 · Δ1.777
- Volkswagensecondary · #293043 · Δ1.832
- Asanaprimary · #273240 · Δ1.847
- Blizzardsecondary · #323a48 · Δ1.978
Palettes built around it
Fonts for this mood
#303445 reads as cool, muted, dark. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #303445
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 #303445 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/303445-9c9fc4-df7e4e-231f2d-e9eef1?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