What color is #040315?

#040315 is a very dark, vivid blue-violet. In RGB it is rgb(4, 3, 21), and in HSL hsl(243, 75%, 5%).

Is #040315 accessible as text?

On white, #040315 has a contrast ratio of 20.41:1 (passes WCAG AA for body text); on black it is 1.03:1 (fails). For text placed on #040315, use white for the best readability.

What is the closest Tailwind color to #040315?

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

What colors go well with #040315?

#040315 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #151603. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #040315 below.

Is #040315 good for buttons?

#040315 works well for buttons and highlights, but use white text on #040315 — black text only reaches 1.03:1, below the 4.5:1 needed for normal-size labels.

Is #040315 the same as CSS black?

No — #040315 is not the CSS named color black, but black (#000000) is the closest CSS named color.

#040315 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #040315

Not just a swatch — here's how #040315 works with other colors. Named schemes with #040315 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #040315 Accent #A5C4C3 Surface #EAD5BF Secondary #9AA0A1 Anchor #22334A

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 #040315 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 #040315 Secondary #7F4534 Surface #EDD7C2 Accent #365247 Anchor #582238

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 #040315 Anchor #141210 Accent #DB9758 Secondary #272833 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 #040315 Secondary #22232B 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.

Build a working theme in the generator →

Color Lab

How #040315 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 42/100

Neutral

Balanced temperature — flexible, sits between warm and cool schemes.

Softness 13/100

Very low

Firm and assertive — carries weight and contrast.

Depth 84/100

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 18/100

Very low

Clean and current — no dusty, aged cast.

Luxury 83/100

Very high

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

Brand distinctiveness 17/100

Very low

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

UI accent fit 4/100

Very low

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

Surface fit 64/100

High

Calm enough for large fills — backgrounds, cards, sections.

Print safety 93/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #040315

For UI

For branding

For interior

For fashion

People also use #040315 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 20.4:1. Use

Subtle surface Use #B7B4E9 for cards and hover fills. Tint 80

Avoid beside #0B0316 — 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 #040315 at work across the surfaces designers actually ship.

Website / UI

Northwind Sign up

Build faster.

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: #040315;
  --color-base-rgb: 4 3 21;
  --color-base-oklch: oklch(11.7% 0.044 281.3);
  --color-50: #F2F1FE;
  --color-100: #DCDAFB;
  --color-200: #BBB8F5;
  --color-300: #8C87E8;
  --color-400: #615BD7;
  --color-500: #3F38BC;
  --color-600: #373290;
  --color-700: #2C2966;
  --color-800: #201E42;
  --color-900: #151429;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  jet-black: {
    50: '#F2F1FE',
    100: '#DCDAFB',
    200: '#BBB8F5',
    300: '#8C87E8',
    400: '#615BD7',
    500: '#3F38BC',
    600: '#373290',
    700: '#2C2966',
    800: '#201E42',
    900: '#151429',
  },
}

$base: #040315;
$base-ink: #FFFFFF;
$base-50: #F2F1FE;
$base-100: #DCDAFB;
$base-200: #BBB8F5;
$base-300: #8C87E8;
$base-400: #615BD7;
$base-500: #3F38BC;
$base-600: #373290;
$base-700: #2C2966;
$base-800: #201E42;
$base-900: #151429;
$base-hover: #030312;
$base-subtle: #918DE0;

{
    "color": {
        "base": {
            "value": "#040315",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2F1FE",
                "type": "color"
            },
            "100": {
                "value": "#DCDAFB",
                "type": "color"
            },
            "200": {
                "value": "#BBB8F5",
                "type": "color"
            },
            "300": {
                "value": "#8C87E8",
                "type": "color"
            },
            "400": {
                "value": "#615BD7",
                "type": "color"
            },
            "500": {
                "value": "#3F38BC",
                "type": "color"
            },
            "600": {
                "value": "#373290",
                "type": "color"
            },
            "700": {
                "value": "#2C2966",
                "type": "color"
            },
            "800": {
                "value": "#201E42",
                "type": "color"
            },
            "900": {
                "value": "#151429",
                "type": "color"
            }
        }
    }
}

Palettes built on #040315

Color Lab

Pairs with #040315

UI roles & guardrails

In real applications

Scales

Every model

Export