What color is #451F9D?

#451F9D is a dark indigo. In RGB it is rgb(69, 31, 157), and in HSL hsl(258, 67%, 37%).

Is #451F9D accessible as text?

On white, #451F9D has a contrast ratio of 10.85:1 (passes WCAG AA for body text); on black it is 1.94:1 (fails). For text placed on #451F9D, use white for the best readability.

What is the closest Tailwind color to #451F9D?

The nearest Tailwind CSS token is violet-900 (#4D179A).

What colors go well with #451F9D?

#451F9D pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #789E1F. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #451F9D below.

Is #451F9D good for buttons?

#451F9D works well for buttons and highlights, but use white text on #451F9D — black text only reaches 1.94:1, below the 4.5:1 needed for normal-size labels.

Is #451F9D the same as CSS indigo?

No — #451F9D is not the CSS named color indigo, but indigo (#4B0082) is the closest CSS named color.

#451F9D Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #451F9D

Not just a swatch — here's how #451F9D works with other colors. Named schemes with #451F9D in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #451F9D Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #624DBC

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

Berry & Cream Lead · 5 colors

Lead #451F9D Surface #F5E5D7 Anchor #5C2141 Accent #E5C2C8 Secondary #332B2F

Indigo 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 #451F9D Secondary #67648D Support #9D9088 Ink #18140F

Indigo 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 Indigo carrying the quiet middle.

Coastal Morning Lead · 5 colors

Lead #451F9D Accent #A5C4C3 Surface #E9D6BF Secondary #9AA0A1 Anchor #22334A

Indigo 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 #451F9D Secondary #E86A6F Accent #F5934B Anchor #583B57 Surface #F7E7D7

Indigo 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 #451F9D 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 23/100

Cool

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

Softness 26/100

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 25/100

Low

Clean and current — no dusty, aged cast.

Luxury 62/100

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 63/100

High

Strong interactive accent — visible and can carry a legible label.

Surface fit 15/100

Very low

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

Print safety 74/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #451F9D

For UI

For branding

For interior

For fashion

People also use #451F9D with

Cerulean 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 10.8:1. Use

Subtle surface Use #D9CFEE for cards and hover fills. Tint 80

Avoid beside #6F1F9E — 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 #451F9D 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: #451F9D;
  --color-base-rgb: 69 31 157;
  --color-base-oklch: oklch(38.2% 0.185 287.8);
  --color-50: #F5F2FD;
  --color-100: #E5DCF9;
  --color-200: #CBBBF1;
  --color-300: #A68CE3;
  --color-400: #8362D0;
  --color-500: #633FB5;
  --color-600: #50378B;
  --color-700: #3D2C62;
  --color-800: #2A2041;
  --color-900: #1B1628;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  indigo: {
    50: '#F5F2FD',
    100: '#E5DCF9',
    200: '#CBBBF1',
    300: '#A68CE3',
    400: '#8362D0',
    500: '#633FB5',
    600: '#50378B',
    700: '#3D2C62',
    800: '#2A2041',
    900: '#1B1628',
  },
}

$base: #451F9D;
$base-ink: #FFFFFF;
$base-50: #F5F2FD;
$base-100: #E5DCF9;
$base-200: #CBBBF1;
$base-300: #A68CE3;
$base-400: #8362D0;
$base-500: #633FB5;
$base-600: #50378B;
$base-700: #3D2C62;
$base-800: #2A2041;
$base-900: #1B1628;
$base-hover: #37197E;
$base-subtle: #C5B6E7;

{
    "color": {
        "base": {
            "value": "#451F9D",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F5F2FD",
                "type": "color"
            },
            "100": {
                "value": "#E5DCF9",
                "type": "color"
            },
            "200": {
                "value": "#CBBBF1",
                "type": "color"
            },
            "300": {
                "value": "#A68CE3",
                "type": "color"
            },
            "400": {
                "value": "#8362D0",
                "type": "color"
            },
            "500": {
                "value": "#633FB5",
                "type": "color"
            },
            "600": {
                "value": "#50378B",
                "type": "color"
            },
            "700": {
                "value": "#3D2C62",
                "type": "color"
            },
            "800": {
                "value": "#2A2041",
                "type": "color"
            },
            "900": {
                "value": "#1B1628",
                "type": "color"
            }
        }
    }
}

Palettes built on #451F9D

Color Lab

Pairs with #451F9D

UI roles & guardrails

In real applications

Scales

Every model

Export