What color is #01002B?

#01002B is a very dark, vivid blue. In RGB it is rgb(1, 0, 43), and in HSL hsl(241, 100%, 8%).

Is #01002B accessible as text?

On white, #01002B 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 #01002B, use white for the best readability.

What is the closest Tailwind color to #01002B?

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

What colors go well with #01002B?

#01002B pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #282900. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #01002B below.

Is #01002B good for buttons?

#01002B works well for buttons and highlights, but use white text on #01002B — black text only reaches 1.04:1, below the 4.5:1 needed for normal-size labels.

Is #01002B the same as CSS black?

No — #01002B is not the CSS named color black, but black (#000000) is the closest CSS named color.

#01002B Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #01002B

Not just a swatch — here's how #01002B works with other colors. Named schemes with #01002B in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #01002B Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

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 #01002B Secondary #AEB4B8 Surface #F1F2F0 Support #7D92A7 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.

Tech Product Signal · 5 colors

Signal #01002B Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #101E48

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 #01002B Secondary #7F4536 Surface #EED7C2 Accent #365246 Anchor #58223A

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.

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #01002B Secondary #202737 Support #9D8F88 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 #01002B 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 29/100

Cool

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

Softness 13/100

Very low

Firm and assertive — carries weight and contrast.

Depth 86/100

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 24/100

Low

Clean and current — no dusty, aged cast.

Luxury 87/100

Very high

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

Brand distinctiveness 34/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 6/100

Very low

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

Surface fit 49/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 84/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #01002B

For UI

For branding

For interior

For fashion

People also use #01002B with

Prussian Blue Jet Black Graphite Gainsboro

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 #AFAEF2 for cards and hover fills. Tint 80

Avoid beside #0E0029 — 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 #01002B 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: #01002B;
  --color-base-rgb: 1 0 43;
  --color-base-oklch: oklch(13.2% 0.089 266.7);
  --color-50: #F1F0FE;
  --color-100: #D8D8FD;
  --color-200: #B2B1FC;
  --color-300: #7977F8;
  --color-400: #4946EC;
  --color-500: #2522D2;
  --color-600: #25239F;
  --color-700: #201F70;
  --color-800: #191848;
  --color-900: #12112C;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  jet-black: {
    50: '#F1F0FE',
    100: '#D8D8FD',
    200: '#B2B1FC',
    300: '#7977F8',
    400: '#4946EC',
    500: '#2522D2',
    600: '#25239F',
    700: '#201F70',
    800: '#191848',
    900: '#12112C',
  },
}

$base: #01002B;
$base-ink: #FFFFFF;
$base-50: #F1F0FE;
$base-100: #D8D8FD;
$base-200: #B2B1FC;
$base-300: #7977F8;
$base-400: #4946EC;
$base-500: #2522D2;
$base-600: #25239F;
$base-700: #201F70;
$base-800: #191848;
$base-900: #12112C;
$base-hover: #010021;
$base-subtle: #8583EE;

{
    "color": {
        "base": {
            "value": "#01002B",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1F0FE",
                "type": "color"
            },
            "100": {
                "value": "#D8D8FD",
                "type": "color"
            },
            "200": {
                "value": "#B2B1FC",
                "type": "color"
            },
            "300": {
                "value": "#7977F8",
                "type": "color"
            },
            "400": {
                "value": "#4946EC",
                "type": "color"
            },
            "500": {
                "value": "#2522D2",
                "type": "color"
            },
            "600": {
                "value": "#25239F",
                "type": "color"
            },
            "700": {
                "value": "#201F70",
                "type": "color"
            },
            "800": {
                "value": "#191848",
                "type": "color"
            },
            "900": {
                "value": "#12112C",
                "type": "color"
            }
        }
    }
}

Palettes built on #01002B

Color Lab

Pairs with #01002B

UI roles & guardrails

In real applications

Scales

Every model

Export