What color is #400FBC?

#400FBC is a medium, vivid indigo. In RGB it is rgb(64, 15, 188), and in HSL hsl(257, 85%, 40%).

Is #400FBC accessible as text?

On white, #400FBC has a contrast ratio of 10.43:1 (passes WCAG AA for body text); on black it is 2.01:1 (fails). For text placed on #400FBC, use white for the best readability.

What is the closest Tailwind color to #400FBC?

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

What colors go well with #400FBC?

#400FBC pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #8CBD0F. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #400FBC below.

Is #400FBC good for buttons?

#400FBC works well for buttons and highlights, but use white text on #400FBC — black text only reaches 2.01:1, below the 4.5:1 needed for normal-size labels.

Is #400FBC the same as CSS mediumblue?

No — #400FBC is not the CSS named color mediumblue, but mediumblue (#0000CD) is the closest CSS named color by perceptual color distance — it sits in a different color family, so treat it as a rough reference, not a match.

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

Palettes built on #400FBC

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

Tech Product Signal · 5 colors

Signal #400FBC Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #5B4CDA

Egyptian 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 Egyptian Blue.

Berry & Cream Lead · 5 colors

Lead #400FBC Surface #F5E5D8 Anchor #5B2142 Accent #E5C2C9 Secondary #322B2F

Egyptian Blue sits between cream and a deep berry here, softened by a blush accent and grounded by charcoal.

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #400FBC Secondary #66699C 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 #400FBC 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 #400FBC Secondary #E86A70 Accent #F5934D 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 #400FBC 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 19/100

Cool

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

Softness 23/100

Low

Firm and assertive — carries weight and contrast.

Depth 66/100

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 12/100

Very low

Clean and current — no dusty, aged cast.

Luxury 57/100

Moderate

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

Brand distinctiveness 89/100

Very high

Bold and ownable — memorable as a primary brand color.

UI accent fit 54/100

Moderate

Workable accent with care around contrast.

Surface fit 14/100

Very 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 #400FBC

For UI

For branding

For interior

For fashion

People also use #400FBC with

Neon Blue Dark Orchid Apple Green 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 10.4:1. Use

Subtle surface Use #D8CEF3 for cards and hover fills. Tint 80

Avoid beside #7A0FBD — 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 #400FBC at work across the surfaces designers actually ship.

Website / UI

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Build faster.

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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: #400FBC;
  --color-base-rgb: 64 15 188;
  --color-base-oklch: oklch(39.9% 0.230 281.0);
  --color-50: #F4F0FE;
  --color-100: #E3D8FD;
  --color-200: #C7B4F9;
  --color-300: #A081EE;
  --color-400: #7B53DF;
  --color-500: #5A30C5;
  --color-600: #4A2C96;
  --color-700: #39256A;
  --color-800: #281C45;
  --color-900: #1A132A;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  egyptian-blue: {
    50: '#F4F0FE',
    100: '#E3D8FD',
    200: '#C7B4F9',
    300: '#A081EE',
    400: '#7B53DF',
    500: '#5A30C5',
    600: '#4A2C96',
    700: '#39256A',
    800: '#281C45',
    900: '#1A132A',
  },
}

$base: #400FBC;
$base-ink: #FFFFFF;
$base-50: #F4F0FE;
$base-100: #E3D8FD;
$base-200: #C7B4F9;
$base-300: #A081EE;
$base-400: #7B53DF;
$base-500: #5A30C5;
$base-600: #4A2C96;
$base-700: #39256A;
$base-800: #281C45;
$base-900: #1A132A;
$base-hover: #340C97;
$base-subtle: #C4B3EF;

{
    "color": {
        "base": {
            "value": "#400FBC",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F0FE",
                "type": "color"
            },
            "100": {
                "value": "#E3D8FD",
                "type": "color"
            },
            "200": {
                "value": "#C7B4F9",
                "type": "color"
            },
            "300": {
                "value": "#A081EE",
                "type": "color"
            },
            "400": {
                "value": "#7B53DF",
                "type": "color"
            },
            "500": {
                "value": "#5A30C5",
                "type": "color"
            },
            "600": {
                "value": "#4A2C96",
                "type": "color"
            },
            "700": {
                "value": "#39256A",
                "type": "color"
            },
            "800": {
                "value": "#281C45",
                "type": "color"
            },
            "900": {
                "value": "#1A132A",
                "type": "color"
            }
        }
    }
}

Palettes built on #400FBC

Color Lab

Pairs with #400FBC

UI roles & guardrails

In real applications

Scales

Every model

Export