What color is #355669?

#355669 is a dark, muted cyan-blue. In RGB it is rgb(53, 86, 105), and in HSL hsl(202, 33%, 31%).

Is #355669 accessible as text?

On white, #355669 has a contrast ratio of 7.82:1 (passes WCAG AA for body text); on black it is 2.69:1 (fails). For text placed on #355669, use white for the best readability.

What is the closest Tailwind color to #355669?

The nearest Tailwind CSS token is mist-600 (#4B585B).

What colors go well with #355669?

#355669 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #694835. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #355669 below.

Is #355669 good for buttons?

#355669 works well for buttons and highlights, but use white text on #355669 — black text only reaches 2.69:1, below the 4.5:1 needed for normal-size labels.

Is #355669 the same as CSS darkslategray?

No — #355669 is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color.

#355669 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #355669

Not just a swatch — here's how #355669 works with other colors. Named schemes with #355669 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #355669 Accent #A6C4C0 Surface #DEDABF Secondary #9AA0A0 Anchor #1F344A

Dark Slate Gray 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 #355669 Secondary #AEB4B8 Surface #F1F2F0 Support #7C93A6 Anchor #2E3236

Dark Slate Gray 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 #355669 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #5A788A

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

Vintage Leather Lead · 5 colors

Lead #355669 Secondary #6E5216 Surface #E2DCC0 Accent #385245 Anchor #57233D

Dark Slate Gray 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 #355669 Secondary #707B82 Support #969386 Ink #16140F

Dark Slate Gray 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 Dark Slate Gray carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #355669 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 43/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 54/100

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 39/100

Low

A faint retro warmth without tipping into sepia.

Luxury 58/100

Moderate

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

Brand distinctiveness 19/100

Very low

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

UI accent fit 61/100

High

Strong interactive accent — visible and can carry a legible label.

Surface fit 42/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 87/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #355669

For UI

For branding

For interior

For fashion

People also use #355669 with

Viridian Yale Blue Coffee Platinum 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 7.8:1. Use

Subtle surface Use #D3DEE4 for cards and hover fills. Tint 80

Avoid beside #354569 — 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 #355669 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: #355669;
  --color-base-rgb: 53 86 105;
  --color-base-oklch: oklch(43.6% 0.050 234.8);
  --color-50: #F5F8FA;
  --color-100: #E3ECF2;
  --color-200: #C9DAE4;
  --color-300: #A2BDCD;
  --color-400: #7EA0B4;
  --color-500: #5D8297;
  --color-600: #4C6675;
  --color-700: #3A4B55;
  --color-800: #293338;
  --color-900: #1A2023;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  dark-slate-gray: {
    50: '#F5F8FA',
    100: '#E3ECF2',
    200: '#C9DAE4',
    300: '#A2BDCD',
    400: '#7EA0B4',
    500: '#5D8297',
    600: '#4C6675',
    700: '#3A4B55',
    800: '#293338',
    900: '#1A2023',
  },
}

$base: #355669;
$base-ink: #FFFFFF;
$base-50: #F5F8FA;
$base-100: #E3ECF2;
$base-200: #C9DAE4;
$base-300: #A2BDCD;
$base-400: #7EA0B4;
$base-500: #5D8297;
$base-600: #4C6675;
$base-700: #3A4B55;
$base-800: #293338;
$base-900: #1A2023;
$base-hover: #2A4554;
$base-subtle: #BDCED7;

{
    "color": {
        "base": {
            "value": "#355669",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F5F8FA",
                "type": "color"
            },
            "100": {
                "value": "#E3ECF2",
                "type": "color"
            },
            "200": {
                "value": "#C9DAE4",
                "type": "color"
            },
            "300": {
                "value": "#A2BDCD",
                "type": "color"
            },
            "400": {
                "value": "#7EA0B4",
                "type": "color"
            },
            "500": {
                "value": "#5D8297",
                "type": "color"
            },
            "600": {
                "value": "#4C6675",
                "type": "color"
            },
            "700": {
                "value": "#3A4B55",
                "type": "color"
            },
            "800": {
                "value": "#293338",
                "type": "color"
            },
            "900": {
                "value": "#1A2023",
                "type": "color"
            }
        }
    }
}

Palettes built on #355669

Color Lab

Pairs with #355669

UI roles & guardrails

In real applications

Scales

Every model

Export