What color is #354566?

#354566 is a dark, muted blue. In RGB it is rgb(53, 69, 102), and in HSL hsl(220, 32%, 30%).

Is #354566 accessible as text?

On white, #354566 has a contrast ratio of 9.57:1 (passes WCAG AA for body text); on black it is 2.19:1 (fails). For text placed on #354566, use white for the best readability.

What is the closest Tailwind color to #354566?

The nearest Tailwind CSS token is sky-900 (#024A70).

What colors go well with #354566?

#354566 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #655534. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #354566 below.

Is #354566 good for buttons?

#354566 works well for buttons and highlights, but use white text on #354566 — black text only reaches 2.19:1, below the 4.5:1 needed for normal-size labels.

Is #354566 the same as CSS darkslategray?

No — #354566 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#354566 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #354566

Not just a swatch — here's how #354566 works with other colors. Named schemes with #354566 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #354566 Accent #A5C4C2 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 #354566 Secondary #AEB4B8 Surface #F1F2F0 Support #7D93A7 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 #354566 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #576786

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 #354566 Secondary #7F4536 Surface #EED7C2 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 #F8F4EF Accent #354566 Secondary #666D79 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 #354566 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 35/100

Cool

Reads cool and recessive — calming, technical, good for trust-led UI.

Softness 38/100

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 41/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 63/100

High

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

Brand distinctiveness 23/100

Low

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

UI accent fit 55/100

Moderate

Workable accent with care around contrast.

Surface fit 41/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 89/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #354566

For UI

For branding

For interior

For fashion

People also use #354566 with

Teal Blue Dark Slate Blue Coffee 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 9.6:1. Use

Subtle surface Use #D3D9E4 for cards and hover fills. Tint 80

Avoid beside #343465 — 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 #354566 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: #354566;
  --color-base-rgb: 53 69 102;
  --color-base-oklch: oklch(39.2% 0.060 264.0);
  --color-50: #F5F6FA;
  --color-100: #E4E8F2;
  --color-200: #C9D2E3;
  --color-300: #A3B1CC;
  --color-400: #7F90B3;
  --color-500: #5E7197;
  --color-600: #4D5A75;
  --color-700: #3A4354;
  --color-800: #292E38;
  --color-900: #1A1D23;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  charcoal: {
    50: '#F5F6FA',
    100: '#E4E8F2',
    200: '#C9D2E3',
    300: '#A3B1CC',
    400: '#7F90B3',
    500: '#5E7197',
    600: '#4D5A75',
    700: '#3A4354',
    800: '#292E38',
    900: '#1A1D23',
  },
}

$base: #354566;
$base-ink: #FFFFFF;
$base-50: #F5F6FA;
$base-100: #E4E8F2;
$base-200: #C9D2E3;
$base-300: #A3B1CC;
$base-400: #7F90B3;
$base-500: #5E7197;
$base-600: #4D5A75;
$base-700: #3A4354;
$base-800: #292E38;
$base-900: #1A1D23;
$base-hover: #2A3751;
$base-subtle: #BCC5D6;

{
    "color": {
        "base": {
            "value": "#354566",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F5F6FA",
                "type": "color"
            },
            "100": {
                "value": "#E4E8F2",
                "type": "color"
            },
            "200": {
                "value": "#C9D2E3",
                "type": "color"
            },
            "300": {
                "value": "#A3B1CC",
                "type": "color"
            },
            "400": {
                "value": "#7F90B3",
                "type": "color"
            },
            "500": {
                "value": "#5E7197",
                "type": "color"
            },
            "600": {
                "value": "#4D5A75",
                "type": "color"
            },
            "700": {
                "value": "#3A4354",
                "type": "color"
            },
            "800": {
                "value": "#292E38",
                "type": "color"
            },
            "900": {
                "value": "#1A1D23",
                "type": "color"
            }
        }
    }
}

Palettes built on #354566

Color Lab

Pairs with #354566

UI roles & guardrails

In real applications

Scales

Every model

Export