What color is #34455B?

#34455B is a dark, muted blue. In RGB it is rgb(52, 69, 91), and in HSL hsl(214, 27%, 28%).

Is #34455B accessible as text?

On white, #34455B has a contrast ratio of 9.78:1 (passes WCAG AA for body text); on black it is 2.15:1 (fails). For text placed on #34455B, use white for the best readability.

What is the closest Tailwind color to #34455B?

The nearest Tailwind CSS token is mist-700 (#394447).

What colors go well with #34455B?

#34455B pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #5B4A34. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #34455B below.

Is #34455B good for buttons?

#34455B works well for buttons and highlights, but use white text on #34455B — black text only reaches 2.15:1, below the 4.5:1 needed for normal-size labels.

Is #34455B the same as CSS darkslategray?

No — #34455B is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#34455B Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #34455B

Not just a swatch — here's how #34455B works with other colors. Named schemes with #34455B in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #34455B Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

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 #34455B 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 #34455B Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #56667B

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 #34455B Secondary #7F4537 Surface #E1DDC1 Accent #375246 Anchor #57233B

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 #34455B Secondary #656B73 Support #9D8F89 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.

Build a working theme in the generator →

Color Lab

How #34455B 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 38/100

Neutral

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

Softness 39/100

Low

Middle-weight — neither delicate nor heavy.

Depth 59/100

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 35/100

Low

A faint retro warmth without tipping into sepia.

Luxury 62/100

High

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

Brand distinctiveness 17/100

Very low

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

UI accent fit 48/100

Moderate

Workable accent with care around contrast.

Surface fit 47/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 91/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #34455B

For UI

For branding

For interior

For fashion

People also use #34455B with

Myrtle Green Charcoal Umber 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 9.8:1. Use

Subtle surface Use #D3D9E1 for cards and hover fills. Tint 80

Avoid beside #34385B — 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 #34455B 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: #34455B;
  --color-base-rgb: 52 69 91;
  --color-base-oklch: oklch(38.5% 0.044 255.1);
  --color-50: #F5F7FA;
  --color-100: #E5EAF0;
  --color-200: #CBD5E1;
  --color-300: #A6B5C9;
  --color-400: #8396AF;
  --color-500: #637792;
  --color-600: #505F72;
  --color-700: #3D4652;
  --color-800: #2A3037;
  --color-900: #1B1E22;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  charcoal: {
    50: '#F5F7FA',
    100: '#E5EAF0',
    200: '#CBD5E1',
    300: '#A6B5C9',
    400: '#8396AF',
    500: '#637792',
    600: '#505F72',
    700: '#3D4652',
    800: '#2A3037',
    900: '#1B1E22',
  },
}

$base: #34455B;
$base-ink: #FFFFFF;
$base-50: #F5F7FA;
$base-100: #E5EAF0;
$base-200: #CBD5E1;
$base-300: #A6B5C9;
$base-400: #8396AF;
$base-500: #637792;
$base-600: #505F72;
$base-700: #3D4652;
$base-800: #2A3037;
$base-900: #1B1E22;
$base-hover: #2A3749;
$base-subtle: #BDC6D3;

{
    "color": {
        "base": {
            "value": "#34455B",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F5F7FA",
                "type": "color"
            },
            "100": {
                "value": "#E5EAF0",
                "type": "color"
            },
            "200": {
                "value": "#CBD5E1",
                "type": "color"
            },
            "300": {
                "value": "#A6B5C9",
                "type": "color"
            },
            "400": {
                "value": "#8396AF",
                "type": "color"
            },
            "500": {
                "value": "#637792",
                "type": "color"
            },
            "600": {
                "value": "#505F72",
                "type": "color"
            },
            "700": {
                "value": "#3D4652",
                "type": "color"
            },
            "800": {
                "value": "#2A3037",
                "type": "color"
            },
            "900": {
                "value": "#1B1E22",
                "type": "color"
            }
        }
    }
}

Palettes built on #34455B

Color Lab

Pairs with #34455B

UI roles & guardrails

In real applications

Scales

Every model

Export