What color is #3F5A56?

#3F5A56 is a dark low-chroma cool gray with a subtle cool cast. In RGB it is rgb(63, 90, 86), and in HSL hsl(171, 18%, 30%).

Is #3F5A56 accessible as text?

On white, #3F5A56 has a contrast ratio of 7.48:1 (passes WCAG AA for body text); on black it is 2.81:1 (fails). For text placed on #3F5A56, use white for the best readability.

What is the closest Tailwind color to #3F5A56?

The nearest Tailwind CSS token is neutral-600 (#525252).

What colors go well with #3F5A56?

As a neutral, #3F5A56 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 #3F5A56 the same as CSS darkslategray?

No — #3F5A56 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.

#3F5A56 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #3F5A56

Not just a swatch — here's how #3F5A56 works with other colors. Named schemes with #3F5A56 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #3F5A56 Accent #A7C4BC Surface #E0DABE Secondary #9AA0A0 Anchor #1C3549

Feldgrau opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.

Nordic Calm Accent · 5 colors

Accent #3F5A56 Secondary #AEB4B8 Surface #F1F2F0 Support #7994A4 Anchor #2E3236

Feldgrau keeps this Nordic scheme quiet — cool greys and a soft white around it, a muted-blue support and a charcoal anchor.

Vintage Leather Lead · 5 colors

Lead #3F5A56 Secondary #725018 Surface #E4DCC0 Accent #3A5142 Anchor #5B241E

Feldgrau 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 #3F5A56 Anchor #382B1E Surface #ECE4D0 Accent #829C71 Secondary #3A3833

Feldgrau 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.

Minimal Editorial Surface · 5 colors

Surface #F7F4EF Accent #3F5A56 Secondary #757E7C Support #979286 Ink #16140F

Feldgrau 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 Feldgrau carrying the quiet middle.

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Color Lab

How #3F5A56 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 43/100

Neutral

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

Softness 45/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 52/100

Moderate

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

Naturalness 13/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 39/100

Low

A faint retro warmth without tipping into sepia.

Luxury 56/100

Moderate

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

Brand distinctiveness 13/100

Very low

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

UI accent fit 55/100

Moderate

Workable accent with care around contrast.

Surface fit 46/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 92/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #3F5A56

For UI

For branding

For interior

For fashion

People also use #3F5A56 with

Myrtle Green Outer Space Eggplant Platinum Dark Slate Gray

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 7.5:1. Use

Subtle surface Use #D7E0DF for cards and hover fills. Tint 80

Avoid beside #3F555A — 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 #3F5A56 at work across the surfaces designers actually ship.

Website / UI

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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: #3F5A56;
  --color-base-rgb: 63 90 86;
  --color-base-oklch: oklch(44.5% 0.033 184.7);
  --color-50: #F6F9F8;
  --color-100: #E7EEED;
  --color-200: #CFDEDB;
  --color-300: #ACC3C0;
  --color-400: #8AA8A3;
  --color-500: #6B8A85;
  --color-600: #566C69;
  --color-700: #404F4C;
  --color-800: #2C3533;
  --color-900: #1C2120;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  feldgrau: {
    50: '#F6F9F8',
    100: '#E7EEED',
    200: '#CFDEDB',
    300: '#ACC3C0',
    400: '#8AA8A3',
    500: '#6B8A85',
    600: '#566C69',
    700: '#404F4C',
    800: '#2C3533',
    900: '#1C2120',
  },
}

$base: #3F5A56;
$base-ink: #FFFFFF;
$base-50: #F6F9F8;
$base-100: #E7EEED;
$base-200: #CFDEDB;
$base-300: #ACC3C0;
$base-400: #8AA8A3;
$base-500: #6B8A85;
$base-600: #566C69;
$base-700: #404F4C;
$base-800: #2C3533;
$base-900: #1C2120;
$base-hover: #324845;
$base-subtle: #C2D1CF;

{
    "color": {
        "base": {
            "value": "#3F5A56",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F6F9F8",
                "type": "color"
            },
            "100": {
                "value": "#E7EEED",
                "type": "color"
            },
            "200": {
                "value": "#CFDEDB",
                "type": "color"
            },
            "300": {
                "value": "#ACC3C0",
                "type": "color"
            },
            "400": {
                "value": "#8AA8A3",
                "type": "color"
            },
            "500": {
                "value": "#6B8A85",
                "type": "color"
            },
            "600": {
                "value": "#566C69",
                "type": "color"
            },
            "700": {
                "value": "#404F4C",
                "type": "color"
            },
            "800": {
                "value": "#2C3533",
                "type": "color"
            },
            "900": {
                "value": "#1C2120",
                "type": "color"
            }
        }
    }
}

Palettes built on #3F5A56

Color Lab

Pairs with #3F5A56

UI roles & guardrails

In real applications

Scales

Every model

Export