What color is #23239D?

#23239D is a dark blue. In RGB it is rgb(35, 35, 157), and in HSL hsl(240, 64%, 38%).

Is #23239D accessible as text?

On white, #23239D has a contrast ratio of 11.67:1 (passes WCAG AA for body text); on black it is 1.80:1 (fails). For text placed on #23239D, use white for the best readability.

What is the closest Tailwind color to #23239D?

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

What colors go well with #23239D?

#23239D pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #9F9F23. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #23239D below.

Is #23239D good for buttons?

#23239D works well for buttons and highlights, but use white text on #23239D — black text only reaches 1.80:1, below the 4.5:1 needed for normal-size labels.

Is #23239D the same as CSS darkblue?

No — #23239D is not the CSS named color darkblue, but darkblue (#00008B) is the closest CSS named color.

#23239D Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #23239D

Not just a swatch — here's how #23239D works with other colors. Named schemes with #23239D in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #23239D Anchor #141210 Accent #DC9659 Secondary #252833 Surface #F3ECE3

Klein 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.

Tech Product Signal · 5 colors

Signal #23239D Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #3F4FBB

Klein 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 Klein Blue.

Moody Editorial Color · 5 colors

Color #23239D Anchor #2A2A2E Secondary #6E6E74 Surface #EEE5DB Accent #230257

Klein 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 Klein Blue.

Coastal Morning Lead · 5 colors

Lead #23239D Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

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

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #23239D Secondary #566189 Support #9D8F88 Ink #18140F

Klein 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 Klein Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #23239D 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 13/100

Cool

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

Softness 25/100

Low

Firm and assertive — carries weight and contrast.

Depth 68/100

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 22/100

Low

Clean and current — no dusty, aged cast.

Luxury 63/100

High

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

Brand distinctiveness 73/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 55/100

Moderate

Workable accent with care around contrast.

Surface fit 17/100

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 #23239D

For UI

For branding

For interior

For fashion

People also use #23239D with

Steel Blue Grape Citron Gainsboro Prussian Blue

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 11.7:1. Use

Subtle surface Use #D1D1EE for cards and hover fills. Tint 80

Avoid beside #4C239F — 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 #23239D 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: #23239D;
  --color-base-rgb: 35 35 157;
  --color-base-oklch: oklch(36.0% 0.188 271.8);
  --color-50: #F2F2FD;
  --color-100: #DDDDF8;
  --color-200: #BCBCF0;
  --color-300: #8E8EE1;
  --color-400: #6464CE;
  --color-500: #4242B3;
  --color-600: #393989;
  --color-700: #2E2E61;
  --color-800: #212140;
  --color-900: #161627;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  klein-blue: {
    50: '#F2F2FD',
    100: '#DDDDF8',
    200: '#BCBCF0',
    300: '#8E8EE1',
    400: '#6464CE',
    500: '#4242B3',
    600: '#393989',
    700: '#2E2E61',
    800: '#212140',
    900: '#161627',
  },
}

$base: #23239D;
$base-ink: #FFFFFF;
$base-50: #F2F2FD;
$base-100: #DDDDF8;
$base-200: #BCBCF0;
$base-300: #8E8EE1;
$base-400: #6464CE;
$base-500: #4242B3;
$base-600: #393989;
$base-700: #2E2E61;
$base-800: #212140;
$base-900: #161627;
$base-hover: #1C1C7F;
$base-subtle: #B9B9E7;

{
    "color": {
        "base": {
            "value": "#23239D",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2F2FD",
                "type": "color"
            },
            "100": {
                "value": "#DDDDF8",
                "type": "color"
            },
            "200": {
                "value": "#BCBCF0",
                "type": "color"
            },
            "300": {
                "value": "#8E8EE1",
                "type": "color"
            },
            "400": {
                "value": "#6464CE",
                "type": "color"
            },
            "500": {
                "value": "#4242B3",
                "type": "color"
            },
            "600": {
                "value": "#393989",
                "type": "color"
            },
            "700": {
                "value": "#2E2E61",
                "type": "color"
            },
            "800": {
                "value": "#212140",
                "type": "color"
            },
            "900": {
                "value": "#161627",
                "type": "color"
            }
        }
    }
}

Palettes built on #23239D

Color Lab

Pairs with #23239D

UI roles & guardrails

In real applications

Scales

Every model

Export