What color is #031CBC?

#031CBC is a dark, vivid blue. In RGB it is rgb(3, 28, 188), and in HSL hsl(232, 97%, 37%).

Is #031CBC accessible as text?

On white, #031CBC has a contrast ratio of 11.08:1 (passes WCAG AA for body text); on black it is 1.90:1 (fails). For text placed on #031CBC, use white for the best readability.

What is the closest Tailwind color to #031CBC?

The nearest Tailwind CSS token is blue-800 (#193CB8).

What colors go well with #031CBC?

#031CBC pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #BAA103. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #031CBC below.

Is #031CBC good for buttons?

#031CBC works well for buttons and highlights, but use white text on #031CBC — black text only reaches 1.90:1, below the 4.5:1 needed for normal-size labels.

Is #031CBC the same as CSS mediumblue?

No — #031CBC is not the CSS named color mediumblue, but mediumblue (#0000CD) is the closest CSS named color.

#031CBC Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #031CBC

Not just a swatch — here's how #031CBC works with other colors. Named schemes with #031CBC in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #031CBC Anchor #141210 Accent #ACAE53 Secondary #242933 Surface #F0EEE3

Medium 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 #031CBC Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #2252D9

Medium 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 Medium Blue.

Moody Editorial Color · 5 colors

Color #031CBC Anchor #2A2A2E Secondary #6E6E74 Surface #E9E7DA Accent #22006E

Medium 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 Medium Blue.

Coastal Morning Lead · 5 colors

Lead #031CBC Accent #A5C4C2 Surface #DDDBBF Secondary #9AA0A1 Anchor #21344A

Medium 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 #031CBC Secondary #516898 Support #9D8F88 Ink #18140F

Medium 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 Medium Blue carrying the quiet middle.

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Color Lab

How #031CBC 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 9/100

Cool

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

Softness 22/100

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 10/100

Very low

Clean and current — no dusty, aged cast.

Luxury 58/100

Moderate

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

Brand distinctiveness 91/100

Very high

Bold and ownable — memorable as a primary brand color.

UI accent fit 46/100

Moderate

Workable accent with care around contrast.

Surface fit 15/100

Very low

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

Print safety 57/100

Moderate

Prints close, with a slight loss of vibrancy.

Pairs with #031CBC

For UI

For branding

For interior

For fashion

People also use #031CBC with

Carolina Blue Grape Dark Goldenrod 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 11.1:1. Use

Subtle surface Use #C8CEF5 for cards and hover fills. Tint 80

Avoid beside #2703BA — 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 #031CBC at work across the surfaces designers actually ship.

Website / UI

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:root {
  --color-base: #031CBC;
  --color-base-rgb: 3 28 188;
  --color-base-oklch: oklch(37.9% 0.236 264.5);
  --color-50: #F0F2FE;
  --color-100: #D8DDFD;
  --color-200: #B1BBFC;
  --color-300: #798AF6;
  --color-400: #495EE9;
  --color-500: #253CD0;
  --color-600: #25359D;
  --color-700: #202B6F;
  --color-800: #191F48;
  --color-900: #11152C;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  medium-blue: {
    50: '#F0F2FE',
    100: '#D8DDFD',
    200: '#B1BBFC',
    300: '#798AF6',
    400: '#495EE9',
    500: '#253CD0',
    600: '#25359D',
    700: '#202B6F',
    800: '#191F48',
    900: '#11152C',
  },
}

$base: #031CBC;
$base-ink: #FFFFFF;
$base-50: #F0F2FE;
$base-100: #D8DDFD;
$base-200: #B1BBFC;
$base-300: #798AF6;
$base-400: #495EE9;
$base-500: #253CD0;
$base-600: #25359D;
$base-700: #202B6F;
$base-800: #191F48;
$base-900: #11152C;
$base-hover: #021695;
$base-subtle: #ABB5F2;

{
    "color": {
        "base": {
            "value": "#031CBC",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F2FE",
                "type": "color"
            },
            "100": {
                "value": "#D8DDFD",
                "type": "color"
            },
            "200": {
                "value": "#B1BBFC",
                "type": "color"
            },
            "300": {
                "value": "#798AF6",
                "type": "color"
            },
            "400": {
                "value": "#495EE9",
                "type": "color"
            },
            "500": {
                "value": "#253CD0",
                "type": "color"
            },
            "600": {
                "value": "#25359D",
                "type": "color"
            },
            "700": {
                "value": "#202B6F",
                "type": "color"
            },
            "800": {
                "value": "#191F48",
                "type": "color"
            },
            "900": {
                "value": "#11152C",
                "type": "color"
            }
        }
    }
}

Palettes built on #031CBC

Color Lab

Pairs with #031CBC

UI roles & guardrails

In real applications

Scales

Every model

Export