What color is #355281?

#355281 is a dark blue. In RGB it is rgb(53, 82, 129), and in HSL hsl(217, 42%, 36%).

Is #355281 accessible as text?

On white, #355281 has a contrast ratio of 7.85:1 (passes WCAG AA for body text); on black it is 2.68:1 (fails). For text placed on #355281, use white for the best readability.

What is the closest Tailwind color to #355281?

The nearest Tailwind CSS token is sky-800 (#00598A).

What colors go well with #355281?

#355281 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #826535. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #355281 below.

Is #355281 good for buttons?

#355281 works well for buttons and highlights, but use white text on #355281 — black text only reaches 2.68:1, below the 4.5:1 needed for normal-size labels.

Is #355281 the same as CSS darkslateblue?

No — #355281 is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#355281 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #355281

Not just a swatch — here's how #355281 works with other colors. Named schemes with #355281 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #355281 Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

Classic Blue 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 #355281 Secondary #AEB4B8 Surface #F1F2F0 Support #7D93A6 Anchor #2E3236

Classic Blue 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 #355281 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #5975A1

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

Vintage Leather Lead · 5 colors

Lead #355281 Secondary #7F4536 Surface #E1DDC1 Accent #375246 Anchor #57223A

Classic Blue 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 #355281 Secondary #707B8C Support #9D8F88 Ink #16140F

Classic Blue 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 Classic Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #355281 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 28/100

Cool

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

Softness 39/100

Low

Middle-weight — neither delicate nor heavy.

Depth 55/100

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 51/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 61/100

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 77/100

High

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

Surface fit 30/100

Low

Usable as a tinted surface in measured doses.

Print safety 83/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #355281

For UI

For branding

For interior

For fashion

People also use #355281 with

Cadet Blue Dark Slate Blue Raw Umber 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 7.8:1. Use

Subtle surface Use #D4DCE8 for cards and hover fills. Tint 80

Avoid beside #353982 — 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 #355281 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: #355281;
  --color-base-rgb: 53 82 129;
  --color-base-oklch: oklch(43.9% 0.085 259.7);
  --color-50: #F4F7FB;
  --color-100: #E2E8F4;
  --color-200: #C5D2E7;
  --color-300: #9CB1D3;
  --color-400: #7691BC;
  --color-500: #55729F;
  --color-600: #475B7B;
  --color-700: #364358;
  --color-800: #262E3B;
  --color-900: #191D24;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  classic-blue: {
    50: '#F4F7FB',
    100: '#E2E8F4',
    200: '#C5D2E7',
    300: '#9CB1D3',
    400: '#7691BC',
    500: '#55729F',
    600: '#475B7B',
    700: '#364358',
    800: '#262E3B',
    900: '#191D24',
  },
}

$base: #355281;
$base-ink: #FFFFFF;
$base-50: #F4F7FB;
$base-100: #E2E8F4;
$base-200: #C5D2E7;
$base-300: #9CB1D3;
$base-400: #7691BC;
$base-500: #55729F;
$base-600: #475B7B;
$base-700: #364358;
$base-800: #262E3B;
$base-900: #191D24;
$base-hover: #2B4268;
$base-subtle: #BECADE;

{
    "color": {
        "base": {
            "value": "#355281",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F7FB",
                "type": "color"
            },
            "100": {
                "value": "#E2E8F4",
                "type": "color"
            },
            "200": {
                "value": "#C5D2E7",
                "type": "color"
            },
            "300": {
                "value": "#9CB1D3",
                "type": "color"
            },
            "400": {
                "value": "#7691BC",
                "type": "color"
            },
            "500": {
                "value": "#55729F",
                "type": "color"
            },
            "600": {
                "value": "#475B7B",
                "type": "color"
            },
            "700": {
                "value": "#364358",
                "type": "color"
            },
            "800": {
                "value": "#262E3B",
                "type": "color"
            },
            "900": {
                "value": "#191D24",
                "type": "color"
            }
        }
    }
}