What color is #3F424D?

#3F424D is a dark low-chroma blue-gray with a subtle blue cast. In RGB it is rgb(63, 66, 77), and in HSL hsl(227, 10%, 27%).

Is #3F424D accessible as text?

On white, #3F424D has a contrast ratio of 10.01:1 (passes WCAG AA for body text); on black it is 2.10:1 (fails). For text placed on #3F424D, use white for the best readability.

What is the closest Tailwind color to #3F424D?

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

What colors go well with #3F424D?

As a neutral, #3F424D 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 #3F424D the same as CSS darkslategray?

No — #3F424D 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.

#3F424D Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #3F424D

Not just a swatch — here's how #3F424D works with other colors. Named schemes with #3F424D in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #3F424D Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #60636E

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

Vintage Leather Lead · 5 colors

Lead #3F424D Secondary #7F4535 Surface #EED7C2 Accent #365247 Anchor #582239

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

Modern Café Dominant · 5 colors

Dominant #3F424D Anchor #3B2924 Surface #F3E1D2 Accent #769F7B Secondary #3C3734

Charcoal anchors this café scheme as the warm mid-tone, lifted by latte cream and a muted sage accent and grounded by espresso brown and a warm charcoal.

Japanese Sand Base · 5 colors

Base #3F424D Surface #F2E8DD Highlight #F8F0E7 Secondary #BEACA2 Ink #2C2724

Charcoal 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.

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #3F424D Secondary #68696D Support #9D8F88 Ink #18140F

Charcoal 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 Charcoal carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #3F424D 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 46/100

Neutral

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

Softness 40/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 58/100

Moderate

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

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 30/100

Low

A faint retro warmth without tipping into sepia.

Luxury 60/100

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 37/100

Low

Workable accent with care around contrast.

Surface fit 54/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 97/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #3F424D

For UI

For branding

For interior

For fashion

People also use #3F424D with

Feldgrau Charcoal Outer Space Gainsboro

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 10.0:1. Use

Subtle surface Use #D7D8DC for cards and hover fills. Tint 80

Avoid beside #403E4C — 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 #3F424D at work across the surfaces designers actually ship.

Website / UI

Northwind Sign up

Build faster.

A working theme, generated in seconds.

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: #3F424D;
  --color-base-rgb: 63 66 77;
  --color-base-oklch: oklch(38.1% 0.019 273.4);
  --color-50: #F7F7F8;
  --color-100: #E8E9ED;
  --color-200: #D2D4DA;
  --color-300: #B1B4BE;
  --color-400: #9194A1;
  --color-500: #727583;
  --color-600: #5B5D67;
  --color-700: #43454B;
  --color-800: #2E2F33;
  --color-900: #1D1E20;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  charcoal: {
    50: '#F7F7F8',
    100: '#E8E9ED',
    200: '#D2D4DA',
    300: '#B1B4BE',
    400: '#9194A1',
    500: '#727583',
    600: '#5B5D67',
    700: '#43454B',
    800: '#2E2F33',
    900: '#1D1E20',
  },
}

$base: #3F424D;
$base-ink: #FFFFFF;
$base-50: #F7F7F8;
$base-100: #E8E9ED;
$base-200: #D2D4DA;
$base-300: #B1B4BE;
$base-400: #9194A1;
$base-500: #727583;
$base-600: #5B5D67;
$base-700: #43454B;
$base-800: #2E2F33;
$base-900: #1D1E20;
$base-hover: #32343D;
$base-subtle: #C3C5CB;

{
    "color": {
        "base": {
            "value": "#3F424D",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F7F7F8",
                "type": "color"
            },
            "100": {
                "value": "#E8E9ED",
                "type": "color"
            },
            "200": {
                "value": "#D2D4DA",
                "type": "color"
            },
            "300": {
                "value": "#B1B4BE",
                "type": "color"
            },
            "400": {
                "value": "#9194A1",
                "type": "color"
            },
            "500": {
                "value": "#727583",
                "type": "color"
            },
            "600": {
                "value": "#5B5D67",
                "type": "color"
            },
            "700": {
                "value": "#43454B",
                "type": "color"
            },
            "800": {
                "value": "#2E2F33",
                "type": "color"
            },
            "900": {
                "value": "#1D1E20",
                "type": "color"
            }
        }
    }
}

Palettes built on #3F424D

Color Lab

Pairs with #3F424D

UI roles & guardrails

In real applications

Scales

Every model

Export