What color is #040221?

#040221 is a very dark, vivid blue-violet. In RGB it is rgb(4, 2, 33), and in HSL hsl(244, 89%, 7%).

Is #040221 accessible as text?

On white, #040221 has a contrast ratio of 20.27:1 (passes WCAG AA for body text); on black it is 1.04:1 (fails). For text placed on #040221, use white for the best readability.

What is the closest Tailwind color to #040221?

The nearest Tailwind CSS token is mauve-950 (#0C090C).

What colors go well with #040221?

#040221 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #202202. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #040221 below.

Is #040221 good for buttons?

#040221 works well for buttons and highlights, but use white text on #040221 — black text only reaches 1.04:1, below the 4.5:1 needed for normal-size labels.

Is #040221 the same as CSS black?

No — #040221 is not the CSS named color black, but black (#000000) is the closest CSS named color.

#040221 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #040221

Not just a swatch — here's how #040221 works with other colors. Named schemes with #040221 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #040221 Accent #A5C4C2 Surface #EAD5BF Secondary #9AA0A1 Anchor #22344A

Jet Black 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 #040221 Secondary #AEB4B8 Surface #F1F2F0 Support #7E92A7 Anchor #2E3236

Jet Black keeps this Nordic scheme quiet — cool greys and a soft white around it, a muted-blue support and a charcoal anchor.

Vintage Leather Lead · 5 colors

Lead #040221 Secondary #7F4534 Surface #EED7C2 Accent #365247 Anchor #582239

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

Luxury Packaging Feature · 5 colors

Feature #040221 Anchor #141210 Accent #DC9758 Secondary #262833 Surface #F3ECE3

Jet Black 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.

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #040221 Secondary #232532 Support #9D9088 Ink #18140F

Jet Black 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 Jet Black carrying the quiet middle.

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Color Lab

How #040221 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 14/100

Very low

Firm and assertive — carries weight and contrast.

Depth 85/100

Very 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 22/100

Low

Clean and current — no dusty, aged cast.

Luxury 85/100

Very high

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

Brand distinctiveness 26/100

Low

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

UI accent fit 5/100

Very low

Weak as an action color — too pale, too dark or too muted to signal.

Surface fit 56/100

Moderate

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 #040221

For UI

For branding

For interior

For fashion

People also use #040221 with

Navy Jet Black Graphite 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 20.3:1. Use

Subtle surface Use #B5B1EE for cards and hover fills. Tint 80

Avoid beside #0F0222 — 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 #040221 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: #040221;
  --color-base-rgb: 4 2 33;
  --color-base-oklch: oklch(12.9% 0.067 276.5);
  --color-50: #F1F0FE;
  --color-100: #DAD8FD;
  --color-200: #B7B2FA;
  --color-300: #867EF1;
  --color-400: #594FE3;
  --color-500: #362CC9;
  --color-600: #312A98;
  --color-700: #28236B;
  --color-800: #1E1B46;
  --color-900: #14132B;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  jet-black: {
    50: '#F1F0FE',
    100: '#DAD8FD',
    200: '#B7B2FA',
    300: '#867EF1',
    400: '#594FE3',
    500: '#362CC9',
    600: '#312A98',
    700: '#28236B',
    800: '#1E1B46',
    900: '#14132B',
  },
}

$base: #040221;
$base-ink: #FFFFFF;
$base-50: #F1F0FE;
$base-100: #DAD8FD;
$base-200: #B7B2FA;
$base-300: #867EF1;
$base-400: #594FE3;
$base-500: #362CC9;
$base-600: #312A98;
$base-700: #28236B;
$base-800: #1E1B46;
$base-900: #14132B;
$base-hover: #03021B;
$base-subtle: #8E88E8;

{
    "color": {
        "base": {
            "value": "#040221",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1F0FE",
                "type": "color"
            },
            "100": {
                "value": "#DAD8FD",
                "type": "color"
            },
            "200": {
                "value": "#B7B2FA",
                "type": "color"
            },
            "300": {
                "value": "#867EF1",
                "type": "color"
            },
            "400": {
                "value": "#594FE3",
                "type": "color"
            },
            "500": {
                "value": "#362CC9",
                "type": "color"
            },
            "600": {
                "value": "#312A98",
                "type": "color"
            },
            "700": {
                "value": "#28236B",
                "type": "color"
            },
            "800": {
                "value": "#1E1B46",
                "type": "color"
            },
            "900": {
                "value": "#14132B",
                "type": "color"
            }
        }
    }
}

Palettes built on #040221

Color Lab

Pairs with #040221

UI roles & guardrails

In real applications

Scales

Every model

Export