What color is #3F353B?

#3F353B is a dark low-chroma warm gray with a subtle warm cast. In RGB it is rgb(63, 53, 59), and in HSL hsl(324, 9%, 23%).

Is #3F353B accessible as text?

On white, #3F353B has a contrast ratio of 11.77:1 (passes WCAG AA for body text); on black it is 1.78:1 (fails). For text placed on #3F353B, use white for the best readability.

What is the closest Tailwind color to #3F353B?

The nearest Tailwind CSS token is zinc-700 (#3F3F46).

What colors go well with #3F353B?

As a neutral, #3F353B pairs cleanly with white, off-white and light grays for text, and sits under accent hues like blue, violet, emerald or warm orange — use it as a dark surface or high-contrast base and let the accent carry the color.

Is #3F353B the same as CSS darkslategray?

No — #3F353B is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color by perceptual color distance — it sits in a different color family, so treat it as a rough reference, not a match.

#3F353B Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #3F353B

Not just a swatch — here's how #3F353B works with other colors. Named schemes with #3F353B in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #3F353B Surface #14161A Highlight #F4F6F8 Secondary #5D6573 Accent #5F555B

Onyx is the vivid signal in this product UI — on a near-black surface with cool white, a slate grey and a lighter tint of Onyx.

Vintage Leather Lead · 5 colors

Lead #3F353B Secondary #7D472D Surface #ECD8C1 Accent #454F38 Anchor #592233

Onyx plays the worn-leather lead, deepened by saddle brown and an oxblood anchor, softened by aged cream and cooled by a muted forest green.

Japanese Sand Base · 5 colors

Base #3F353B Surface #F1E8DC Highlight #F7F0E7 Secondary #BCADA0 Ink #2B2723

Onyx sets a calm, sun-bleached base here, wrapped in bone and paper off-whites and a soft greige, with a single ink accent for wabi-sabi restraint.

Berry & Cream Lead · 5 colors

Lead #3F353B Surface #F4E6D7 Anchor #5D203C Accent #E6C2C4 Secondary #332B2E

Onyx sits between cream and a deep berry here, softened by a blush accent and grounded by charcoal.

Minimal Editorial Surface · 5 colors

Surface #F7F4EF Accent #3F353B Secondary #615D5F Support #9C9087 Ink #18140F

Onyx is the single accent in this high-contrast editorial system — set on near-white paper against near-black ink, with a warm grey and a desaturated tint of Onyx carrying the quiet middle.

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Color Lab

How #3F353B actually behaves in design work — read from its OKLCH lightness, chroma and hue, not just its raw numbers. Ten signals to help you decide where this color earns its place.

Warmth 52/100

Neutral

Balanced temperature — flexible, sits between warm and cool schemes.

Softness 37/100

Low

Middle-weight — neither delicate nor heavy.

Depth 61/100

High

Mid depth — usable as an accent or a muted ground.

Naturalness 3/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 37/100

Low

A faint retro warmth without tipping into sepia.

Luxury 63/100

High

Restrained and premium — deep, quiet, high-end packaging and fashion.

Brand distinctiveness 7/100

Very low

Quiet and neutral — a supporting tone, not a signature.

UI accent fit 29/100

Low

Weak as an action color — too pale, too dark or too muted to signal.

Surface fit 58/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 98/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #3F353B

For UI

For branding

For interior

For fashion

People also use #3F353B with

Eggplant Onyx Gainsboro Taupe

UI roles & guardrails

Primary action Safe as a filled button with white label. AAA

Body text Passes on white at 16px and above. Pass

Large display Fine for headings 24px+ on white. Pass

Background Pair with white text at 11.8:1. Use

Subtle surface Use #DAD5D8 for cards and hover fills. Tint 80

Avoid beside #403538 — the hue gap is too small to read as intentional. Clash

In real applications

Not a swatch to memorise — a color to build with. Here is #3F353B at work across the surfaces designers actually ship.

Website / UI

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Build faster.

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Dashboard

Revenue

$48.2k ▲ 12%

Brand

AVELINE

Studio

Poster

Nov 14 · 8PM

NIGHT
MARKET

Packaging

BLOOM

Botanical Wash

250 ml

Interior

Every model

Export

:root {
  --color-base: #3F353B;
  --color-base-rgb: 63 53 59;
  --color-base-oklch: oklch(34.2% 0.017 341.3);
  --color-50: #F8F7F8;
  --color-100: #EDE9EB;
  --color-200: #DAD3D7;
  --color-300: #BDB2B9;
  --color-400: #A0929A;
  --color-500: #82727C;
  --color-600: #675B62;
  --color-700: #4B4448;
  --color-800: #332E31;
  --color-900: #201D1F;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  onyx: {
    50: '#F8F7F8',
    100: '#EDE9EB',
    200: '#DAD3D7',
    300: '#BDB2B9',
    400: '#A0929A',
    500: '#82727C',
    600: '#675B62',
    700: '#4B4448',
    800: '#332E31',
    900: '#201D1F',
  },
}

$base: #3F353B;
$base-ink: #FFFFFF;
$base-50: #F8F7F8;
$base-100: #EDE9EB;
$base-200: #DAD3D7;
$base-300: #BDB2B9;
$base-400: #A0929A;
$base-500: #82727C;
$base-600: #675B62;
$base-700: #4B4448;
$base-800: #332E31;
$base-900: #201D1F;
$base-hover: #332B30;
$base-subtle: #C8C0C5;

{
    "color": {
        "base": {
            "value": "#3F353B",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F8F7F8",
                "type": "color"
            },
            "100": {
                "value": "#EDE9EB",
                "type": "color"
            },
            "200": {
                "value": "#DAD3D7",
                "type": "color"
            },
            "300": {
                "value": "#BDB2B9",
                "type": "color"
            },
            "400": {
                "value": "#A0929A",
                "type": "color"
            },
            "500": {
                "value": "#82727C",
                "type": "color"
            },
            "600": {
                "value": "#675B62",
                "type": "color"
            },
            "700": {
                "value": "#4B4448",
                "type": "color"
            },
            "800": {
                "value": "#332E31",
                "type": "color"
            },
            "900": {
                "value": "#201D1F",
                "type": "color"
            }
        }
    }
}