What color is #604E87?

#604E87 is a medium, muted indigo. In RGB it is rgb(96, 78, 135), and in HSL hsl(259, 27%, 42%).

Is #604E87 accessible as text?

On white, #604E87 has a contrast ratio of 7.15:1 (passes WCAG AA for body text); on black it is 2.94:1 (fails). For text placed on #604E87, use white for the best readability.

What is the closest Tailwind color to #604E87?

The nearest Tailwind CSS token is mauve-600 (#594C5B).

What colors go well with #604E87?

#604E87 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #76884E. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #604E87 below.

Is #604E87 good for buttons?

#604E87 works well for buttons and highlights, but use white text on #604E87 — black text only reaches 2.94:1, below the 4.5:1 needed for normal-size labels.

Is #604E87 the same as CSS darkslateblue?

No — #604E87 is not the CSS named color darkslateblue, but darkslateblue (#483D8B) 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.

#604E87 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #604E87

Not just a swatch — here's how #604E87 works with other colors. Named schemes with #604E87 in its natural role, and a note on why the supporting colors balance it.

Berry & Cream Lead · 5 colors

Lead #604E87 Surface #F5E6D7 Anchor #5C2140 Accent #E5C2C8 Secondary #332B2F

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

Coastal Morning Lead · 5 colors

Lead #604E87 Accent #A5C4C4 Surface #E9D6BF Secondary #9AA0A1 Anchor #23334B

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

Nordic Calm Accent · 5 colors

Accent #604E87 Secondary #AFB4B8 Surface #F1F2F0 Support #7F92A7 Anchor #2E3236

Ultra Violet keeps this Nordic scheme quiet — cool greys and a soft white around it, a muted-blue support and a charcoal anchor.

Vintage Leather Lead · 5 colors

Lead #604E87 Secondary #7E4632 Surface #EDD8C2 Accent #355248 Anchor #582237

Ultra Violet 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 #604E87 Secondary #847F94 Support #9C9088 Ink #18140F

Ultra Violet 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 Ultra Violet carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #604E87 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 39/100

Neutral

Balanced temperature — flexible, sits between warm and cool schemes.

Softness 41/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 53/100

Moderate

Mid depth — usable as an accent or a muted ground.

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 62/100

High

Faded, nostalgic quality — editorial, heritage and retro work.

Luxury 59/100

Moderate

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

Brand distinctiveness 25/100

Low

Quiet and neutral — a supporting tone, not a signature.

UI accent fit 85/100

Very high

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

Surface fit 27/100

Low

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

Print safety 88/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #604E87

For UI

For branding

For interior

For fashion

People also use #604E87 with

Very Peri Plum Olive Green Gainsboro Onyx

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 7.2:1. Use

Subtle surface Use #DFDCE7 for cards and hover fills. Tint 80

Avoid beside #744E88 — 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 #604E87 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: #604E87;
  --color-base-rgb: 96 78 135;
  --color-base-oklch: oklch(46.7% 0.092 297.3);
  --color-50: #F7F5FA;
  --color-100: #E8E5F0;
  --color-200: #D2CBE1;
  --color-300: #B1A6C9;
  --color-400: #9183AF;
  --color-500: #726392;
  --color-600: #5B5072;
  --color-700: #433D52;
  --color-800: #2E2A37;
  --color-900: #1D1B22;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  ultra-violet: {
    50: '#F7F5FA',
    100: '#E8E5F0',
    200: '#D2CBE1',
    300: '#B1A6C9',
    400: '#9183AF',
    500: '#726392',
    600: '#5B5072',
    700: '#433D52',
    800: '#2E2A37',
    900: '#1D1B22',
  },
}

$base: #604E87;
$base-ink: #FFFFFF;
$base-50: #F7F5FA;
$base-100: #E8E5F0;
$base-200: #D2CBE1;
$base-300: #B1A6C9;
$base-400: #9183AF;
$base-500: #726392;
$base-600: #5B5072;
$base-700: #433D52;
$base-800: #2E2A37;
$base-900: #1D1B22;
$base-hover: #4D3F6D;
$base-subtle: #CFCADC;

{
    "color": {
        "base": {
            "value": "#604E87",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F7F5FA",
                "type": "color"
            },
            "100": {
                "value": "#E8E5F0",
                "type": "color"
            },
            "200": {
                "value": "#D2CBE1",
                "type": "color"
            },
            "300": {
                "value": "#B1A6C9",
                "type": "color"
            },
            "400": {
                "value": "#9183AF",
                "type": "color"
            },
            "500": {
                "value": "#726392",
                "type": "color"
            },
            "600": {
                "value": "#5B5072",
                "type": "color"
            },
            "700": {
                "value": "#433D52",
                "type": "color"
            },
            "800": {
                "value": "#2E2A37",
                "type": "color"
            },
            "900": {
                "value": "#1D1B22",
                "type": "color"
            }
        }
    }
}

Palettes built on #604E87

Color Lab

Pairs with #604E87

UI roles & guardrails

In real applications

Scales

Every model

Export