What color is #33337D?

#33337D is a dark blue-violet. In RGB it is rgb(51, 51, 125), and in HSL hsl(240, 42%, 35%).

Is #33337D accessible as text?

On white, #33337D has a contrast ratio of 10.99:1 (passes WCAG AA for body text); on black it is 1.91:1 (fails). For text placed on #33337D, use white for the best readability.

What is the closest Tailwind color to #33337D?

The nearest Tailwind CSS token is indigo-900 (#312C85).

What colors go well with #33337D?

#33337D pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #7F7F34. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #33337D below.

Is #33337D good for buttons?

#33337D works well for buttons and highlights, but use white text on #33337D — black text only reaches 1.91:1, below the 4.5:1 needed for normal-size labels.

Is #33337D the same as CSS darkslateblue?

No — #33337D is not the CSS named color darkslateblue, but darkslateblue (#483D8B) is the closest CSS named color.

#33337D Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #33337D

Not just a swatch — here's how #33337D works with other colors. Named schemes with #33337D in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #33337D Anchor #141210 Accent #DC9758 Secondary #262833 Surface #F3ECE3

Dark Slate Blue carries the depth in this luxury scheme, offset by a brass accent and near-black and held together by a deep neutral and an off-white surface.

Moody Editorial Color · 5 colors

Color #33337D Anchor #2A2A2E Secondary #6E6E74 Surface #EEE5DB Accent #261444

Dark Slate Blue adds the colour to this moody editorial scheme — charcoal and a mid-grey around it, a bone highlight, and a muted jewel accent drawn from Dark Slate Blue.

Coastal Morning Lead · 5 colors

Lead #33337D Accent #A5C4C2 Surface #EAD5BF Secondary #9AA0A1 Anchor #22344A

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

Vintage Leather Lead · 5 colors

Lead #33337D Secondary #7F4534 Surface #EED7C2 Accent #365247 Anchor #582239

Dark Slate 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 #33337D Secondary #5F637E Support #9D9088 Ink #18140F

Dark Slate 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 Dark Slate Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #33337D 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 26/100

Cool

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

Softness 30/100

Low

Firm and assertive — carries weight and contrast.

Depth 64/100

High

Deep and grounding — anchors a layout, strong dark-mode base.

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 40/100

Low

A faint retro warmth without tipping into sepia.

Luxury 68/100

High

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

Brand distinctiveness 47/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 62/100

High

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

Surface fit 24/100

Low

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

Print safety 81/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #33337D

For UI

For branding

For interior

For fashion

People also use #33337D with

Teal Blue Eminence Olive Green Gainsboro Prussian Blue

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 11.0:1. Use

Subtle surface Use #D4D4E8 for cards and hover fills. Tint 80

Avoid beside #4D347F — 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 #33337D at work across the surfaces designers actually ship.

Website / UI

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A working theme, generated in seconds.

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: #33337D;
  --color-base-rgb: 51 51 125;
  --color-base-oklch: oklch(36.6% 0.122 278.5);
  --color-50: #F4F4FB;
  --color-100: #E2E2F4;
  --color-200: #C5C5E7;
  --color-300: #9C9CD3;
  --color-400: #7676BC;
  --color-500: #55559F;
  --color-600: #47477B;
  --color-700: #363658;
  --color-800: #26263B;
  --color-900: #191924;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  dark-slate-blue: {
    50: '#F4F4FB',
    100: '#E2E2F4',
    200: '#C5C5E7',
    300: '#9C9CD3',
    400: '#7676BC',
    500: '#55559F',
    600: '#47477B',
    700: '#363658',
    800: '#26263B',
    900: '#191924',
  },
}

$base: #33337D;
$base-ink: #FFFFFF;
$base-50: #F4F4FB;
$base-100: #E2E2F4;
$base-200: #C5C5E7;
$base-300: #9C9CD3;
$base-400: #7676BC;
$base-500: #55559F;
$base-600: #47477B;
$base-700: #363658;
$base-800: #26263B;
$base-900: #191924;
$base-hover: #292965;
$base-subtle: #BDBDDD;

{
    "color": {
        "base": {
            "value": "#33337D",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F4FB",
                "type": "color"
            },
            "100": {
                "value": "#E2E2F4",
                "type": "color"
            },
            "200": {
                "value": "#C5C5E7",
                "type": "color"
            },
            "300": {
                "value": "#9C9CD3",
                "type": "color"
            },
            "400": {
                "value": "#7676BC",
                "type": "color"
            },
            "500": {
                "value": "#55559F",
                "type": "color"
            },
            "600": {
                "value": "#47477B",
                "type": "color"
            },
            "700": {
                "value": "#363658",
                "type": "color"
            },
            "800": {
                "value": "#26263B",
                "type": "color"
            },
            "900": {
                "value": "#191924",
                "type": "color"
            }
        }
    }
}

Palettes built on #33337D

Color Lab

Pairs with #33337D

UI roles & guardrails

In real applications

Scales

Every model

Export