What color is #42304C?

#42304C is a dark, muted violet. In RGB it is rgb(66, 48, 76), and in HSL hsl(279, 23%, 24%).

Is #42304C accessible as text?

On white, #42304C has a contrast ratio of 11.94:1 (passes WCAG AA for body text); on black it is 1.76:1 (fails). For text placed on #42304C, use white for the best readability.

What is the closest Tailwind color to #42304C?

The nearest Tailwind CSS token is mauve-700 (#463947).

What colors go well with #42304C?

#42304C pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #394B2F. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #42304C below.

Is #42304C good for buttons?

#42304C works well for buttons and highlights, but use white text on #42304C — black text only reaches 1.76:1, below the 4.5:1 needed for normal-size labels.

Is #42304C the same as CSS darkslategray?

No — #42304C is not the CSS named color darkslategray, but darkslategray (#2F4F4F) 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.

#42304C Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #42304C

Not just a swatch — here's how #42304C works with other colors. Named schemes with #42304C in its natural role, and a note on why the supporting colors balance it.

Vintage Leather Lead · 5 colors

Lead #42304C Secondary #7E4630 Surface #ECD8C1 Accent #355249 Anchor #592235

Onyx plays the worn-leather lead, deepened by saddle brown and an oxblood anchor, softened by aged cream and cooled by a muted forest green.

Japanese Sand Base · 5 colors

Base #42304C Surface #F1E8DC Highlight #F8F0E7 Secondary #BDADA1 Ink #2C2723

Onyx sets a calm, sun-bleached base here, wrapped in bone and paper off-whites and a soft greige, with a single ink accent for wabi-sabi restraint.

Luxury Packaging Feature · 5 colors

Feature #42304C Anchor #141210 Accent #D89954 Secondary #2C2630 Surface #F3EDE3

Onyx 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.

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #42304C Secondary #625B66 Support #9C9088 Ink #18140F

Onyx 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 Onyx carrying the quiet middle.

Berry & Cream Lead · 5 colors

Lead #42304C Surface #F5E6D7 Anchor #5C213F Accent #E5C2C6 Secondary #332B2F

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

Build a working theme in the generator →

Color Lab

How #42304C 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 48/100

Neutral

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

Softness 34/100

Low

Middle-weight — neither delicate nor heavy.

Depth 63/100

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 43/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 66/100

High

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

Brand distinctiveness 20/100

Low

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

UI accent fit 40/100

Low

Workable accent with care around contrast.

Surface fit 47/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 94/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #42304C

For UI

For branding

For interior

For fashion

People also use #42304C with

Charcoal Onyx Brunswick Green Gainsboro

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 11.9:1. Use

Subtle surface Use #DAD2DF for cards and hover fills. Tint 80

Avoid beside #4B2F4B — 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 #42304C at work across the surfaces designers actually ship.

Website / UI

Northwind Sign up

Build faster.

A working theme, generated in seconds.

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: #42304C;
  --color-base-rgb: 66 48 76;
  --color-base-oklch: oklch(34.2% 0.053 313.0);
  --color-50: #F8F5F9;
  --color-100: #ECE6F0;
  --color-200: #D9CDE0;
  --color-300: #BCA9C6;
  --color-400: #9F86AC;
  --color-500: #80668F;
  --color-600: #65536F;
  --color-700: #4A3E51;
  --color-800: #322B36;
  --color-900: #201B22;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  onyx: {
    50: '#F8F5F9',
    100: '#ECE6F0',
    200: '#D9CDE0',
    300: '#BCA9C6',
    400: '#9F86AC',
    500: '#80668F',
    600: '#65536F',
    700: '#4A3E51',
    800: '#322B36',
    900: '#201B22',
  },
}

$base: #42304C;
$base-ink: #FFFFFF;
$base-50: #F8F5F9;
$base-100: #ECE6F0;
$base-200: #D9CDE0;
$base-300: #BCA9C6;
$base-400: #9F86AC;
$base-500: #80668F;
$base-600: #65536F;
$base-700: #4A3E51;
$base-800: #322B36;
$base-900: #201B22;
$base-hover: #34263C;
$base-subtle: #C8BBCF;

{
    "color": {
        "base": {
            "value": "#42304C",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F8F5F9",
                "type": "color"
            },
            "100": {
                "value": "#ECE6F0",
                "type": "color"
            },
            "200": {
                "value": "#D9CDE0",
                "type": "color"
            },
            "300": {
                "value": "#BCA9C6",
                "type": "color"
            },
            "400": {
                "value": "#9F86AC",
                "type": "color"
            },
            "500": {
                "value": "#80668F",
                "type": "color"
            },
            "600": {
                "value": "#65536F",
                "type": "color"
            },
            "700": {
                "value": "#4A3E51",
                "type": "color"
            },
            "800": {
                "value": "#322B36",
                "type": "color"
            },
            "900": {
                "value": "#201B22",
                "type": "color"
            }
        }
    }
}