What color is #231F37?

#231F37 is a very dark, muted indigo. In RGB it is rgb(35, 31, 55), and in HSL hsl(250, 28%, 17%).

Is #231F37 accessible as text?

On white, #231F37 has a contrast ratio of 15.88:1 (passes WCAG AA for body text); on black it is 1.32:1 (fails). For text placed on #231F37, use white for the best readability.

What is the closest Tailwind color to #231F37?

The nearest Tailwind CSS token is mauve-800 (#2A212C).

What colors go well with #231F37?

#231F37 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #33371F. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #231F37 below.

Is #231F37 good for buttons?

#231F37 works well for buttons and highlights, but use white text on #231F37 — black text only reaches 1.32:1, below the 4.5:1 needed for normal-size labels.

Is #231F37 the same as CSS midnightblue?

No — #231F37 is not the CSS named color midnightblue, but midnightblue (#191970) is the closest CSS named color.

#231F37 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #231F37

Not just a swatch — here's how #231F37 works with other colors. Named schemes with #231F37 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #231F37 Accent #A5C4C3 Surface #E9D6BF Secondary #9AA0A1 Anchor #22334A

Graphite 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 #231F37 Secondary #AFB4B8 Surface #F1F2F0 Support #7F92A7 Anchor #2E3236

Graphite 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 #231F37 Secondary #7E4633 Surface #EDD8C2 Accent #355248 Anchor #582237

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

Luxury Packaging Feature · 5 colors

Feature #231F37 Anchor #141210 Accent #DB9757 Secondary #292732 Surface #F3ECE3

Graphite 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 #231F37 Secondary #46454F Support #9D9088 Ink #18140F

Graphite 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 Graphite carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #231F37 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 43/100

Neutral

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

Softness 27/100

Low

Firm and assertive — carries weight and contrast.

Depth 71/100

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 30/100

Low

A faint retro warmth without tipping into sepia.

Luxury 72/100

High

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

Brand distinctiveness 17/100

Very low

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

UI accent fit 19/100

Very low

Weak as an action color — too pale, too dark or too muted to signal.

Surface fit 55/100

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 #231F37

For UI

For branding

For interior

For fashion

People also use #231F37 with

Charcoal Russian Violet Bistre Gainsboro Gunmetal Gray

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 15.9:1. Use

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

Avoid beside #2B1F37 — 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 #231F37 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: #231F37;
  --color-base-rgb: 35 31 55;
  --color-base-oklch: oklch(25.6% 0.045 290.5);
  --color-50: #F6F5FA;
  --color-100: #E7E5F1;
  --color-200: #CFCBE2;
  --color-300: #ACA6CA;
  --color-400: #8A82B0;
  --color-500: #6A6293;
  --color-600: #554F72;
  --color-700: #403C53;
  --color-800: #2C2A37;
  --color-900: #1C1B22;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  graphite: {
    50: '#F6F5FA',
    100: '#E7E5F1',
    200: '#CFCBE2',
    300: '#ACA6CA',
    400: '#8A82B0',
    500: '#6A6293',
    600: '#554F72',
    700: '#403C53',
    800: '#2C2A37',
    900: '#1C1B22',
  },
}

$base: #231F37;
$base-ink: #FFFFFF;
$base-50: #F6F5FA;
$base-100: #E7E5F1;
$base-200: #CFCBE2;
$base-300: #ACA6CA;
$base-400: #8A82B0;
$base-500: #6A6293;
$base-600: #554F72;
$base-700: #403C53;
$base-800: #2C2A37;
$base-900: #1C1B22;
$base-hover: #1C192C;
$base-subtle: #B6B2CD;

{
    "color": {
        "base": {
            "value": "#231F37",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F6F5FA",
                "type": "color"
            },
            "100": {
                "value": "#E7E5F1",
                "type": "color"
            },
            "200": {
                "value": "#CFCBE2",
                "type": "color"
            },
            "300": {
                "value": "#ACA6CA",
                "type": "color"
            },
            "400": {
                "value": "#8A82B0",
                "type": "color"
            },
            "500": {
                "value": "#6A6293",
                "type": "color"
            },
            "600": {
                "value": "#554F72",
                "type": "color"
            },
            "700": {
                "value": "#403C53",
                "type": "color"
            },
            "800": {
                "value": "#2C2A37",
                "type": "color"
            },
            "900": {
                "value": "#1C1B22",
                "type": "color"
            }
        }
    }
}

Palettes built on #231F37

Color Lab

Pairs with #231F37

UI roles & guardrails

In real applications

Scales

Every model

Export