What color is #33508F?

#33508F is a dark blue. In RGB it is rgb(51, 80, 143), and in HSL hsl(221, 47%, 38%).

Is #33508F accessible as text?

On white, #33508F has a contrast ratio of 7.82:1 (passes WCAG AA for body text); on black it is 2.68:1 (fails). For text placed on #33508F, use white for the best readability.

What is the closest Tailwind color to #33508F?

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

What colors go well with #33508F?

#33508F pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #8E7233. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #33508F below.

Is #33508F good for buttons?

#33508F works well for buttons and highlights, but use white text on #33508F — black text only reaches 2.68:1, below the 4.5:1 needed for normal-size labels.

Is #33508F the same as CSS darkslateblue?

No — #33508F is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#33508F Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #33508F

Not just a swatch — here's how #33508F works with other colors. Named schemes with #33508F in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #33508F Accent #A5C4C1 Surface #DDDBBF 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.

Tech Product Signal · 5 colors

Signal #33508F Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #5774AF

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 #33508F Secondary #7F4536 Surface #EED7C2 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.

Berry & Cream Lead · 5 colors

Lead #33508F Surface #F6E5D8 Anchor #5B2144 Accent #E5C2CA Secondary #322B2F

Classic Blue 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 #33508F Secondary #6F7B92 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 #33508F 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 23/100

Cool

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

Softness 37/100

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 47/100

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 30/100

Low

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

UI accent fit 84/100

Very high

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

Surface fit 23/100

Low

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

Print safety 80/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #33508F

For UI

For branding

For interior

For fashion

People also use #33508F with

Cadet Blue Dark Slate Blue Olive Brown 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 #D5DBEA for cards and hover fills. Tint 80

Avoid beside #35338E — 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 #33508F 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: #33508F;
  --color-base-rgb: 51 80 143;
  --color-base-oklch: oklch(44.2% 0.109 263.9);
  --color-50: #F3F6FB;
  --color-100: #E0E7F5;
  --color-200: #C3CFE9;
  --color-300: #99ACD6;
  --color-400: #728BC0;
  --color-500: #516BA4;
  --color-600: #44567E;
  --color-700: #34405A;
  --color-800: #252C3C;
  --color-900: #181C25;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  classic-blue: {
    50: '#F3F6FB',
    100: '#E0E7F5',
    200: '#C3CFE9',
    300: '#99ACD6',
    400: '#728BC0',
    500: '#516BA4',
    600: '#44567E',
    700: '#34405A',
    800: '#252C3C',
    900: '#181C25',
  },
}

$base: #33508F;
$base-ink: #FFFFFF;
$base-50: #F3F6FB;
$base-100: #E0E7F5;
$base-200: #C3CFE9;
$base-300: #99ACD6;
$base-400: #728BC0;
$base-500: #516BA4;
$base-600: #44567E;
$base-700: #34405A;
$base-800: #252C3C;
$base-900: #181C25;
$base-hover: #294072;
$base-subtle: #BFC9E1;

{
    "color": {
        "base": {
            "value": "#33508F",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F6FB",
                "type": "color"
            },
            "100": {
                "value": "#E0E7F5",
                "type": "color"
            },
            "200": {
                "value": "#C3CFE9",
                "type": "color"
            },
            "300": {
                "value": "#99ACD6",
                "type": "color"
            },
            "400": {
                "value": "#728BC0",
                "type": "color"
            },
            "500": {
                "value": "#516BA4",
                "type": "color"
            },
            "600": {
                "value": "#44567E",
                "type": "color"
            },
            "700": {
                "value": "#34405A",
                "type": "color"
            },
            "800": {
                "value": "#252C3C",
                "type": "color"
            },
            "900": {
                "value": "#181C25",
                "type": "color"
            }
        }
    }
}