What color is #400FAB?

#400FAB is a dark, vivid indigo. In RGB it is rgb(64, 15, 171), and in HSL hsl(259, 84%, 36%).

Is #400FAB accessible as text?

On white, #400FAB has a contrast ratio of 11.20:1 (passes WCAG AA for body text); on black it is 1.87:1 (fails). For text placed on #400FAB, use white for the best readability.

What is the closest Tailwind color to #400FAB?

The nearest Tailwind CSS token is indigo-800 (#372AAC).

What colors go well with #400FAB?

#400FAB pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #78A90F. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #400FAB below.

Is #400FAB good for buttons?

#400FAB works well for buttons and highlights, but use white text on #400FAB — black text only reaches 1.87:1, below the 4.5:1 needed for normal-size labels.

Is #400FAB the same as CSS indigo?

No — #400FAB is not the CSS named color indigo, but indigo (#4B0082) is the closest CSS named color.

#400FAB Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #400FAB

Not just a swatch — here's how #400FAB works with other colors. Named schemes with #400FAB in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #400FAB Anchor #141210 Accent #DB9757 Secondary #272833 Surface #F3ECE3

Egyptian 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 #400FAB Anchor #2A2A2E Secondary #6E6E74 Surface #EEE5DA Accent #33005D

Egyptian 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 Egyptian Blue.

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #400FAB Secondary #636392 Support #9D9088 Ink #18140F

Egyptian 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 Egyptian Blue carrying the quiet middle.

Coastal Morning Lead · 5 colors

Lead #400FAB Accent #A5C4C3 Surface #EAD5BF Secondary #9AA0A1 Anchor #22334A

Egyptian Blue opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.

Sunset Warmth Glow · 5 colors

Glow #400FAB Secondary #E86A70 Accent #F5934C Anchor #583B57 Surface #F7E7D7

Egyptian Blue glows at the center of this sunset palette, joined by coral and gold, deepened by a plum anchor and cooled with cream.

Build a working theme in the generator →

Color Lab

How #400FAB 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 21/100

Cool

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

Softness 24/100

Low

Firm and assertive — carries weight and contrast.

Depth 67/100

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 17/100

Very low

Clean and current — no dusty, aged cast.

Luxury 60/100

Moderate

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

Brand distinctiveness 82/100

Very high

Bold and ownable — memorable as a primary brand color.

UI accent fit 55/100

Moderate

Workable accent with care around contrast.

Surface fit 15/100

Very low

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

Print safety 69/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #400FAB

For UI

For branding

For interior

For fashion

People also use #400FAB with

Sapphire Blue Mauveine Olive Drab Gainsboro Russian Violet

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 11.2:1. Use

Subtle surface Use #D7CBF2 for cards and hover fills. Tint 80

Avoid beside #730FA9 — 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 #400FAB 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: #400FAB;
  --color-base-rgb: 64 15 171;
  --color-base-oklch: oklch(37.9% 0.212 283.9);
  --color-50: #F5F0FE;
  --color-100: #E4D8FD;
  --color-200: #CAB4F8;
  --color-300: #A481EE;
  --color-400: #8053DF;
  --color-500: #5F30C4;
  --color-600: #4E2D95;
  --color-700: #3B2569;
  --color-800: #291C45;
  --color-900: #1A132A;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  egyptian-blue: {
    50: '#F5F0FE',
    100: '#E4D8FD',
    200: '#CAB4F8',
    300: '#A481EE',
    400: '#8053DF',
    500: '#5F30C4',
    600: '#4E2D95',
    700: '#3B2569',
    800: '#291C45',
    900: '#1A132A',
  },
}

$base: #400FAB;
$base-ink: #FFFFFF;
$base-50: #F5F0FE;
$base-100: #E4D8FD;
$base-200: #CAB4F8;
$base-300: #A481EE;
$base-400: #8053DF;
$base-500: #5F30C4;
$base-600: #4E2D95;
$base-700: #3B2569;
$base-800: #291C45;
$base-900: #1A132A;
$base-hover: #330C87;
$base-subtle: #C3AFED;

{
    "color": {
        "base": {
            "value": "#400FAB",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F5F0FE",
                "type": "color"
            },
            "100": {
                "value": "#E4D8FD",
                "type": "color"
            },
            "200": {
                "value": "#CAB4F8",
                "type": "color"
            },
            "300": {
                "value": "#A481EE",
                "type": "color"
            },
            "400": {
                "value": "#8053DF",
                "type": "color"
            },
            "500": {
                "value": "#5F30C4",
                "type": "color"
            },
            "600": {
                "value": "#4E2D95",
                "type": "color"
            },
            "700": {
                "value": "#3B2569",
                "type": "color"
            },
            "800": {
                "value": "#291C45",
                "type": "color"
            },
            "900": {
                "value": "#1A132A",
                "type": "color"
            }
        }
    }
}

Palettes built on #400FAB

Color Lab

Pairs with #400FAB

UI roles & guardrails

In real applications

Scales

Every model

Export