What color is #313C4E?

#313C4E is a dark low-chroma blue-gray with a subtle blue cast. In RGB it is rgb(49, 60, 78), and in HSL hsl(217, 23%, 25%).

Is #313C4E accessible as text?

On white, #313C4E has a contrast ratio of 11.13:1 (passes WCAG AA for body text); on black it is 1.89:1 (fails). For text placed on #313C4E, use white for the best readability.

What is the closest Tailwind color to #313C4E?

The nearest Tailwind CSS token is gray-700 (#364153).

What colors go well with #313C4E?

As a neutral, #313C4E 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 #313C4E the same as CSS darkslategray?

No — #313C4E 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.

#313C4E Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #313C4E

Not just a swatch — here's how #313C4E works with other colors. Named schemes with #313C4E in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #313C4E Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #21344A

Charcoal 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 #313C4E Secondary #AEB4B8 Surface #F1F2F0 Support #7D93A6 Anchor #2E3236

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

Tech Product Signal · 5 colors

Signal #313C4E Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #525D6E

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 #313C4E Secondary #7F4536 Surface #E1DDC1 Accent #375246 Anchor #57223A

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.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #313C4E Secondary #5E6269 Support #9D8F88 Ink #16140F

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.

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Color Lab

How #313C4E 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 41/100

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 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 31/100

Low

A faint retro warmth without tipping into sepia.

Luxury 64/100

High

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 37/100

Low

Workable accent with care around contrast.

Surface fit 51/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 93/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #313C4E

For UI

For branding

For interior

For fashion

People also use #313C4E with

Feldgrau Gunmetal Gray Taupe Gainsboro Charcoal

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 11.1:1. Use

Subtle surface Use #D2D7DF for cards and hover fills. Tint 80

Avoid beside #31334E — 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 #313C4E 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: #313C4E;
  --color-base-rgb: 49 60 78;
  --color-base-oklch: oklch(35.4% 0.035 260.1);
  --color-50: #F5F7F9;
  --color-100: #E6E9F0;
  --color-200: #CDD4E0;
  --color-300: #A9B4C6;
  --color-400: #8695AC;
  --color-500: #66768F;
  --color-600: #535E6F;
  --color-700: #3E4551;
  --color-800: #2B2F36;
  --color-900: #1B1E22;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  charcoal: {
    50: '#F5F7F9',
    100: '#E6E9F0',
    200: '#CDD4E0',
    300: '#A9B4C6',
    400: '#8695AC',
    500: '#66768F',
    600: '#535E6F',
    700: '#3E4551',
    800: '#2B2F36',
    900: '#1B1E22',
  },
}

$base: #313C4E;
$base-ink: #FFFFFF;
$base-50: #F5F7F9;
$base-100: #E6E9F0;
$base-200: #CDD4E0;
$base-300: #A9B4C6;
$base-400: #8695AC;
$base-500: #66768F;
$base-600: #535E6F;
$base-700: #3E4551;
$base-800: #2B2F36;
$base-900: #1B1E22;
$base-hover: #27303F;
$base-subtle: #BCC3D0;

{
    "color": {
        "base": {
            "value": "#313C4E",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F5F7F9",
                "type": "color"
            },
            "100": {
                "value": "#E6E9F0",
                "type": "color"
            },
            "200": {
                "value": "#CDD4E0",
                "type": "color"
            },
            "300": {
                "value": "#A9B4C6",
                "type": "color"
            },
            "400": {
                "value": "#8695AC",
                "type": "color"
            },
            "500": {
                "value": "#66768F",
                "type": "color"
            },
            "600": {
                "value": "#535E6F",
                "type": "color"
            },
            "700": {
                "value": "#3E4551",
                "type": "color"
            },
            "800": {
                "value": "#2B2F36",
                "type": "color"
            },
            "900": {
                "value": "#1B1E22",
                "type": "color"
            }
        }
    }
}