What color is #030603?

#030603 is a very dark low-chroma cool gray with a subtle cool cast. In RGB it is rgb(3, 6, 3), and in HSL hsl(120, 33%, 2%).

Is #030603 accessible as text?

On white, #030603 has a contrast ratio of 20.36:1 (passes WCAG AA for body text); on black it is 1.03:1 (fails). For text placed on #030603, use white for the best readability.

What is the closest Tailwind color to #030603?

The nearest Tailwind CSS token is zinc-950 (#09090B).

What colors go well with #030603?

As a neutral, #030603 pairs cleanly with white, off-white and light grays for text, and sits under accent hues like blue, violet, emerald or warm orange — use it as a dark surface or high-contrast base and let the accent carry the color.

Is #030603 the same as CSS black?

No — #030603 is not the CSS named color black, but black (#000000) is the closest CSS named color.

#030603 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #030603

Not just a swatch — here's how #030603 works with other colors. Named schemes with #030603 in its natural role, and a note on why the supporting colors balance it.

Botanical Studio Lead · 5 colors

Lead #030603 Secondary #4C6B3B Accent #AD6B00 Surface #EEEAD6 Anchor #3C2F20

Jet Black leads this botanical set among foliage greens and a terracotta accent, softened by cream and grounded in bark brown.

Tech Product Signal · 5 colors

Signal #030603 Surface #13161A Highlight #F4F6F8 Secondary #576770 Accent #1A201A

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

Vintage Leather Lead · 5 colors

Lead #030603 Secondary #754E1B Surface #E6DBC0 Accent #3C5140 Anchor #5B2322

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.

Japanese Sand Base · 5 colors

Base #030603 Surface #EEE9DC Highlight #F5F1E7 Secondary #B6B09F Ink #2B2723

Jet Black sets a calm, sun-bleached base here, wrapped in bone and paper off-whites and a soft greige, with a single ink accent for wabi-sabi restraint.

Minimal Editorial Surface · 5 colors

Surface #F7F4EF Accent #030603 Secondary #212321 Support #989286 Ink #17140F

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 #030603 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 50/100

Neutral

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

Softness 14/100

Very low

Firm and assertive — carries weight and contrast.

Depth 82/100

Very high

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

Naturalness 29/100

Low

Loosely natural — an earthy edge without being rustic.

Vintage feel 16/100

Very low

Clean and current — no dusty, aged cast.

Luxury 80/100

High

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

Brand distinctiveness 5/100

Very low

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

UI accent fit 3/100

Very low

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

Surface fit 73/100

High

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

Print safety 97/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #030603

For UI

For branding

For interior

For fashion

People also use #030603 with

Graphite Jet Black Platinum Hunter Green

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 #C1D9C1 for cards and hover fills. Tint 80

Avoid beside #030705 — 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 #030603 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: #030603;
  --color-base-rgb: 3 6 3;
  --color-base-oklch: oklch(11.5% 0.014 144.6);
  --color-50: #F5FAF5;
  --color-100: #E3F2E3;
  --color-200: #C9E4C9;
  --color-300: #A2CDA2;
  --color-400: #7EB47E;
  --color-500: #5D975D;
  --color-600: #4C754C;
  --color-700: #3A553A;
  --color-800: #293829;
  --color-900: #1A231A;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  jet-black: {
    50: '#F5FAF5',
    100: '#E3F2E3',
    200: '#C9E4C9',
    300: '#A2CDA2',
    400: '#7EB47E',
    500: '#5D975D',
    600: '#4C754C',
    700: '#3A553A',
    800: '#293829',
    900: '#1A231A',
  },
}

$base: #030603;
$base-ink: #FFFFFF;
$base-50: #F5FAF5;
$base-100: #E3F2E3;
$base-200: #C9E4C9;
$base-300: #A2CDA2;
$base-400: #7EB47E;
$base-500: #5D975D;
$base-600: #4C754C;
$base-700: #3A553A;
$base-800: #293829;
$base-900: #1A231A;
$base-hover: #030503;
$base-subtle: #A1C7A1;

{
    "color": {
        "base": {
            "value": "#030603",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F5FAF5",
                "type": "color"
            },
            "100": {
                "value": "#E3F2E3",
                "type": "color"
            },
            "200": {
                "value": "#C9E4C9",
                "type": "color"
            },
            "300": {
                "value": "#A2CDA2",
                "type": "color"
            },
            "400": {
                "value": "#7EB47E",
                "type": "color"
            },
            "500": {
                "value": "#5D975D",
                "type": "color"
            },
            "600": {
                "value": "#4C754C",
                "type": "color"
            },
            "700": {
                "value": "#3A553A",
                "type": "color"
            },
            "800": {
                "value": "#293829",
                "type": "color"
            },
            "900": {
                "value": "#1A231A",
                "type": "color"
            }
        }
    }
}

Palettes built on #030603

Color Lab

Pairs with #030603

UI roles & guardrails

In real applications

Scales

Every model

Export