What color is #01158B?

#01158B is a dark, vivid blue. In RGB it is rgb(1, 21, 139), and in HSL hsl(231, 99%, 27%).

Is #01158B accessible as text?

On white, #01158B has a contrast ratio of 14.18:1 (passes WCAG AA for body text); on black it is 1.48:1 (fails). For text placed on #01158B, use white for the best readability.

What is the closest Tailwind color to #01158B?

The nearest Tailwind CSS token is indigo-900 (#312C85).

What colors go well with #01158B?

#01158B pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #897501. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #01158B below.

Is #01158B good for buttons?

#01158B works well for buttons and highlights, but use white text on #01158B — black text only reaches 1.48:1, below the 4.5:1 needed for normal-size labels.

Is #01158B the same as CSS darkblue?

No — #01158B is not the CSS named color darkblue, but darkblue (#00008B) is the closest CSS named color.

#01158B Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #01158B

Not just a swatch — here's how #01158B works with other colors. Named schemes with #01158B in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #01158B 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.

Tech Product Signal · 5 colors

Signal #01158B Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #1E44A9

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

Moody Editorial Color · 5 colors

Color #01158B Anchor #2A2A2E Secondary #6E6E74 Surface #E9E7DA Accent #13004A

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 #01158B Accent #A5C4C2 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.

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #01158B Secondary #425479 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.

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Color Lab

How #01158B 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 9/100

Cool

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

Softness 21/100

Low

Firm and assertive — carries weight and contrast.

Depth 74/100

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 19/100

Very low

Clean and current — no dusty, aged cast.

Luxury 68/100

High

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

Brand distinctiveness 72/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 39/100

Low

Workable accent with care around contrast.

Surface fit 20/100

Low

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

Print safety 66/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #01158B

For UI

For branding

For interior

For fashion

People also use #01158B with

Steel Blue Indigo Dark Olive Green 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 14.2:1. Use

Subtle surface Use #BFC7F4 for cards and hover fills. Tint 80

Avoid beside #1A0189 — 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 #01158B 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: #01158B;
  --color-base-rgb: 1 21 139;
  --color-base-oklch: oklch(30.7% 0.187 264.4);
  --color-50: #F0F2FE;
  --color-100: #D8DDFD;
  --color-200: #B1BCFC;
  --color-300: #788BF7;
  --color-400: #4760EB;
  --color-500: #233DD2;
  --color-600: #23369F;
  --color-700: #1F2B6F;
  --color-800: #192048;
  --color-900: #11152C;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  phthalo-blue: {
    50: '#F0F2FE',
    100: '#D8DDFD',
    200: '#B1BCFC',
    300: '#788BF7',
    400: '#4760EB',
    500: '#233DD2',
    600: '#23369F',
    700: '#1F2B6F',
    800: '#192048',
    900: '#11152C',
  },
}

$base: #01158B;
$base-ink: #FFFFFF;
$base-50: #F0F2FE;
$base-100: #D8DDFD;
$base-200: #B1BCFC;
$base-300: #788BF7;
$base-400: #4760EB;
$base-500: #233DD2;
$base-600: #23369F;
$base-700: #1F2B6F;
$base-800: #192048;
$base-900: #11152C;
$base-hover: #01116E;
$base-subtle: #9DAAF1;

{
    "color": {
        "base": {
            "value": "#01158B",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F2FE",
                "type": "color"
            },
            "100": {
                "value": "#D8DDFD",
                "type": "color"
            },
            "200": {
                "value": "#B1BCFC",
                "type": "color"
            },
            "300": {
                "value": "#788BF7",
                "type": "color"
            },
            "400": {
                "value": "#4760EB",
                "type": "color"
            },
            "500": {
                "value": "#233DD2",
                "type": "color"
            },
            "600": {
                "value": "#23369F",
                "type": "color"
            },
            "700": {
                "value": "#1F2B6F",
                "type": "color"
            },
            "800": {
                "value": "#192048",
                "type": "color"
            },
            "900": {
                "value": "#11152C",
                "type": "color"
            }
        }
    }
}

Palettes built on #01158B

Color Lab

Pairs with #01158B

UI roles & guardrails

In real applications

Scales

Every model

Export