What color is #33539E?

#33539E is a medium blue. In RGB it is rgb(51, 83, 158), and in HSL hsl(222, 51%, 41%).

Is #33539E accessible as text?

On white, #33539E has a contrast ratio of 7.31:1 (passes WCAG AA for body text); on black it is 2.87:1 (fails). For text placed on #33539E, use white for the best readability.

What is the closest Tailwind color to #33539E?

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

What colors go well with #33539E?

#33539E pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #9E7E33. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #33539E below.

Is #33539E good for buttons?

#33539E works well for buttons and highlights, but use white text on #33539E — black text only reaches 2.87:1, below the 4.5:1 needed for normal-size labels.

Is #33539E the same as CSS darkslateblue?

No — #33539E is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#33539E Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #33539E

Not just a swatch — here's how #33539E works with other colors. Named schemes with #33539E in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #33539E Accent #A5C4C2 Surface #DDDBBF Secondary #9AA0A1 Anchor #21344A

Lapis Lazuli opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.

Tech Product Signal · 5 colors

Signal #33539E Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #5878BE

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

Vintage Leather Lead · 5 colors

Lead #33539E Secondary #7F4536 Surface #EED7C2 Accent #365246 Anchor #58223A

Lapis Lazuli plays the worn-leather lead, deepened by saddle brown and an oxblood anchor, softened by aged cream and cooled by a muted forest green.

Berry & Cream Lead · 5 colors

Lead #33539E Surface #F6E5D8 Anchor #5B2144 Accent #E5C2CA Secondary #322B2F

Lapis Lazuli sits between cream and a deep berry here, softened by a blush accent and grounded by charcoal.

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #33539E Secondary #73809B Support #9D8F88 Ink #18140F

Lapis Lazuli 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 Lapis Lazuli carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #33539E 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 19/100

Cool

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

Softness 37/100

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 43/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 60/100

Moderate

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

Brand distinctiveness 34/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 91/100

Very high

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

Surface fit 16/100

Very low

Too saturated or mid-toned for big areas — keep it to accents.

Print safety 77/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #33539E

For UI

For branding

For interior

For fashion

People also use #33539E with

Verdigris Dark Slate Blue Copper 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 7.3:1. Use

Subtle surface Use #D6DCEC for cards and hover fills. Tint 80

Avoid beside #37339E — 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 #33539E 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: #33539E;
  --color-base-rgb: 51 83 158;
  --color-base-oklch: oklch(45.9% 0.127 264.5);
  --color-50: #F3F6FC;
  --color-100: #E0E6F6;
  --color-200: #C1CEEB;
  --color-300: #97AAD9;
  --color-400: #6F88C3;
  --color-500: #4E68A7;
  --color-600: #415481;
  --color-700: #333F5C;
  --color-800: #242C3D;
  --color-900: #181C26;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  lapis-lazuli: {
    50: '#F3F6FC',
    100: '#E0E6F6',
    200: '#C1CEEB',
    300: '#97AAD9',
    400: '#6F88C3',
    500: '#4E68A7',
    600: '#415481',
    700: '#333F5C',
    800: '#242C3D',
    900: '#181C26',
  },
}

$base: #33539E;
$base-ink: #FFFFFF;
$base-50: #F3F6FC;
$base-100: #E0E6F6;
$base-200: #C1CEEB;
$base-300: #97AAD9;
$base-400: #6F88C3;
$base-500: #4E68A7;
$base-600: #415481;
$base-700: #333F5C;
$base-800: #242C3D;
$base-900: #181C26;
$base-hover: #29437E;
$base-subtle: #C0CBE3;

{
    "color": {
        "base": {
            "value": "#33539E",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F6FC",
                "type": "color"
            },
            "100": {
                "value": "#E0E6F6",
                "type": "color"
            },
            "200": {
                "value": "#C1CEEB",
                "type": "color"
            },
            "300": {
                "value": "#97AAD9",
                "type": "color"
            },
            "400": {
                "value": "#6F88C3",
                "type": "color"
            },
            "500": {
                "value": "#4E68A7",
                "type": "color"
            },
            "600": {
                "value": "#415481",
                "type": "color"
            },
            "700": {
                "value": "#333F5C",
                "type": "color"
            },
            "800": {
                "value": "#242C3D",
                "type": "color"
            },
            "900": {
                "value": "#181C26",
                "type": "color"
            }
        }
    }
}

Palettes built on #33539E

Color Lab

Pairs with #33539E

UI roles & guardrails

In real applications

Scales

Every model

Export