What color is #424B71?

#424B71 is a dark, muted blue-violet. In RGB it is rgb(66, 75, 113), and in HSL hsl(229, 26%, 35%).

Is #424B71 accessible as text?

On white, #424B71 has a contrast ratio of 8.48:1 (passes WCAG AA for body text); on black it is 2.48:1 (fails). For text placed on #424B71, use white for the best readability.

What is the closest Tailwind color to #424B71?

The nearest Tailwind CSS token is mauve-600 (#594C5B).

What colors go well with #424B71?

#424B71 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #706842. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #424B71 below.

Is #424B71 good for buttons?

#424B71 works well for buttons and highlights, but use white text on #424B71 — black text only reaches 2.48:1, below the 4.5:1 needed for normal-size labels.

Is #424B71 the same as CSS darkslateblue?

No — #424B71 is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#424B71 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #424B71

Not just a swatch — here's how #424B71 works with other colors. Named schemes with #424B71 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #424B71 Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

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 #424B71 Secondary #AEB4B8 Surface #F1F2F0 Support #7E92A7 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 #424B71 Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #646D92

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 #424B71 Secondary #7F4535 Surface #EED7C2 Accent #365247 Anchor #582239

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 #F8F4EF Accent #424B71 Secondary #707483 Support #9D8F88 Ink #18140F

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 #424B71 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 36/100

Cool

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

Softness 40/100

Low

Middle-weight — neither delicate nor heavy.

Depth 56/100

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 46/100

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 25/100

Low

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

UI accent fit 65/100

High

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

Surface fit 38/100

Low

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 #424B71

For UI

For branding

For interior

For fashion

People also use #424B71 with

Teal Blue Ultra Violet Raw Umber Gainsboro Onyx

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 8.5:1. Use

Subtle surface Use #D8DAE4 for cards and hover fills. Tint 80

Avoid beside #494270 — 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 #424B71 at work across the surfaces designers actually ship.

Website / UI

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Build faster.

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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: #424B71;
  --color-base-rgb: 66 75 113;
  --color-base-oklch: oklch(42.2% 0.064 273.2);
  --color-50: #F5F6FA;
  --color-100: #E5E7F0;
  --color-200: #CCD0E1;
  --color-300: #A7ADC8;
  --color-400: #838BAF;
  --color-500: #646C91;
  --color-600: #515771;
  --color-700: #3D4152;
  --color-800: #2A2C37;
  --color-900: #1B1C22;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  classic-blue: {
    50: '#F5F6FA',
    100: '#E5E7F0',
    200: '#CCD0E1',
    300: '#A7ADC8',
    400: '#838BAF',
    500: '#646C91',
    600: '#515771',
    700: '#3D4152',
    800: '#2A2C37',
    900: '#1B1C22',
  },
}

$base: #424B71;
$base-ink: #FFFFFF;
$base-50: #F5F6FA;
$base-100: #E5E7F0;
$base-200: #CCD0E1;
$base-300: #A7ADC8;
$base-400: #838BAF;
$base-500: #646C91;
$base-600: #515771;
$base-700: #3D4152;
$base-800: #2A2C37;
$base-900: #1B1C22;
$base-hover: #353C5A;
$base-subtle: #C3C7D7;

{
    "color": {
        "base": {
            "value": "#424B71",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F5F6FA",
                "type": "color"
            },
            "100": {
                "value": "#E5E7F0",
                "type": "color"
            },
            "200": {
                "value": "#CCD0E1",
                "type": "color"
            },
            "300": {
                "value": "#A7ADC8",
                "type": "color"
            },
            "400": {
                "value": "#838BAF",
                "type": "color"
            },
            "500": {
                "value": "#646C91",
                "type": "color"
            },
            "600": {
                "value": "#515771",
                "type": "color"
            },
            "700": {
                "value": "#3D4152",
                "type": "color"
            },
            "800": {
                "value": "#2A2C37",
                "type": "color"
            },
            "900": {
                "value": "#1B1C22",
                "type": "color"
            }
        }
    }
}