What color is #01248D?

#01248D is a dark, vivid blue. In RGB it is rgb(1, 36, 141), and in HSL hsl(225, 99%, 28%).

Is #01248D accessible as text?

On white, #01248D has a contrast ratio of 12.82:1 (passes WCAG AA for body text); on black it is 1.64:1 (fails). For text placed on #01248D, use white for the best readability.

What is the closest Tailwind color to #01248D?

The nearest Tailwind CSS token is blue-900 (#1C398E).

What colors go well with #01248D?

#01248D pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #8E6B01. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #01248D below.

Is #01248D good for buttons?

#01248D works well for buttons and highlights, but use white text on #01248D — black text only reaches 1.64:1, below the 4.5:1 needed for normal-size labels.

Is #01248D the same as CSS darkblue?

No — #01248D is not the CSS named color darkblue, but darkblue (#00008B) is the closest CSS named color.

#01248D Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #01248D

Not just a swatch — here's how #01248D works with other colors. Named schemes with #01248D in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #01248D Anchor #141210 Accent #ACAE53 Secondary #242933 Surface #F0EEE3

Phthalo 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 #01248D Anchor #2A2A2E Secondary #6E6E74 Surface #E9E7DA Accent #16024D

Phthalo 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 Phthalo Blue.

Coastal Morning Lead · 5 colors

Lead #01248D Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #21344A

Phthalo 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 #01248D Secondary #7F4536 Surface #EED7C2 Accent #375246 Anchor #57223A

Phthalo 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 #01248D Secondary #495B7E Support #9D8F88 Ink #18140F

Phthalo 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 Phthalo Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #01248D 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 8/100

Cool

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

Softness 24/100

Low

Firm and assertive — carries weight and contrast.

Depth 70/100

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 23/100

Low

Clean and current — no dusty, aged cast.

Luxury 67/100

High

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

Brand distinctiveness 68/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 48/100

Moderate

Workable accent with care around contrast.

Surface fit 18/100

Very low

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

Print safety 68/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #01248D

For UI

For branding

For interior

For fashion

People also use #01248D with

Bondi Blue Phthalo Blue Raw Umber Gainsboro Charcoal

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 12.8:1. Use

Subtle surface Use #C0CDF4 for cards and hover fills. Tint 80

Avoid beside #0C018E — 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 #01248D 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: #01248D;
  --color-base-rgb: 1 36 141;
  --color-base-oklch: oklch(33.1% 0.175 263.6);
  --color-50: #F0F4FE;
  --color-100: #D8E1FD;
  --color-200: #B1C3FC;
  --color-300: #7898F7;
  --color-400: #4770EB;
  --color-500: #234FD2;
  --color-600: #23429F;
  --color-700: #1F336F;
  --color-800: #192548;
  --color-900: #11182C;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  phthalo-blue: {
    50: '#F0F4FE',
    100: '#D8E1FD',
    200: '#B1C3FC',
    300: '#7898F7',
    400: '#4770EB',
    500: '#234FD2',
    600: '#23429F',
    700: '#1F336F',
    800: '#192548',
    900: '#11182C',
  },
}

$base: #01248D;
$base-ink: #FFFFFF;
$base-50: #F0F4FE;
$base-100: #D8E1FD;
$base-200: #B1C3FC;
$base-300: #7898F7;
$base-400: #4770EB;
$base-500: #234FD2;
$base-600: #23429F;
$base-700: #1F336F;
$base-800: #192548;
$base-900: #11182C;
$base-hover: #011D72;
$base-subtle: #9EB3F1;

{
    "color": {
        "base": {
            "value": "#01248D",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F4FE",
                "type": "color"
            },
            "100": {
                "value": "#D8E1FD",
                "type": "color"
            },
            "200": {
                "value": "#B1C3FC",
                "type": "color"
            },
            "300": {
                "value": "#7898F7",
                "type": "color"
            },
            "400": {
                "value": "#4770EB",
                "type": "color"
            },
            "500": {
                "value": "#234FD2",
                "type": "color"
            },
            "600": {
                "value": "#23429F",
                "type": "color"
            },
            "700": {
                "value": "#1F336F",
                "type": "color"
            },
            "800": {
                "value": "#192548",
                "type": "color"
            },
            "900": {
                "value": "#11182C",
                "type": "color"
            }
        }
    }
}

Palettes built on #01248D

Color Lab

Pairs with #01248D

UI roles & guardrails

In real applications

Scales

Every model

Export