What color is #2378CD?

#2378CD is a medium, vivid blue. In RGB it is rgb(35, 120, 205), and in HSL hsl(210, 71%, 47%).

Is #2378CD accessible as text?

On white, #2378CD has a contrast ratio of 4.53:1 (passes WCAG AA for body text); on black it is 4.64:1 (passes). For text placed on #2378CD, use black for the best readability.

What is the closest Tailwind color to #2378CD?

The nearest Tailwind CSS token is sky-600 (#0084D1).

What colors go well with #2378CD?

#2378CD pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #CD7823. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #2378CD below.

Is #2378CD good for buttons?

#2378CD works for buttons; black text has the higher contrast, so prefer it for labels.

Is #2378CD the same as CSS royalblue?

No — #2378CD is not the CSS named color royalblue, but royalblue (#4169E1) is the closest CSS named color.

#2378CD Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #2378CD

Not just a swatch — here's how #2378CD works with other colors. Named schemes with #2378CD in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #2378CD Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

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

Tech Product Signal · 5 colors

Signal #2378CD Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #579EED

True 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 True Blue.

Vintage Leather Lead · 5 colors

Lead #2378CD Secondary #7F4537 Surface #E1DDC0 Accent #375245 Anchor #57233B

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

Berry & Cream Lead · 5 colors

Lead #2378CD Surface #EDE9D6 Anchor #5A2145 Accent #E4C2CB Secondary #322B2F

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

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #2378CD Secondary #89A3C2 Support #959386 Ink #16140F

True 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 True Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #2378CD 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 8/100

Cool

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

Softness 41/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 45/100

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 39/100

Low

A faint retro warmth without tipping into sepia.

Luxury 48/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 41/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 97/100

Very high

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

Surface fit 14/100

Very low

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

Print safety 68/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #2378CD

For UI

For branding

For interior

For fashion

People also use #2378CD with

Turquoise Medium Blue Ochre Gainsboro Charcoal

UI roles & guardrails

Primary action Safe as a filled button with white label. AA

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 4.5:1. Use

Subtle surface Use #D6E4F2 for cards and hover fills. Tint 80

Avoid beside #233FCD — 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 #2378CD 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: #2378CD;
  --color-base-rgb: 35 120 205;
  --color-base-oklch: oklch(56.8% 0.153 252.6);
  --color-50: #F1F7FD;
  --color-100: #DBEBFA;
  --color-200: #B9D6F3;
  --color-300: #8AB8E5;
  --color-400: #5E99D4;
  --color-500: #3C7AB9;
  --color-600: #35618D;
  --color-700: #2B4764;
  --color-800: #1F3042;
  --color-900: #151F28;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  true-blue: {
    50: '#F1F7FD',
    100: '#DBEBFA',
    200: '#B9D6F3',
    300: '#8AB8E5',
    400: '#5E99D4',
    500: '#3C7AB9',
    600: '#35618D',
    700: '#2B4764',
    800: '#1F3042',
    900: '#151F28',
  },
}

$base: #2378CD;
$base-ink: #141310;
$base-50: #F1F7FD;
$base-100: #DBEBFA;
$base-200: #B9D6F3;
$base-300: #8AB8E5;
$base-400: #5E99D4;
$base-500: #3C7AB9;
$base-600: #35618D;
$base-700: #2B4764;
$base-800: #1F3042;
$base-900: #151F28;
$base-hover: #1C60A4;
$base-subtle: #C1D6EC;

{
    "color": {
        "base": {
            "value": "#2378CD",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1F7FD",
                "type": "color"
            },
            "100": {
                "value": "#DBEBFA",
                "type": "color"
            },
            "200": {
                "value": "#B9D6F3",
                "type": "color"
            },
            "300": {
                "value": "#8AB8E5",
                "type": "color"
            },
            "400": {
                "value": "#5E99D4",
                "type": "color"
            },
            "500": {
                "value": "#3C7AB9",
                "type": "color"
            },
            "600": {
                "value": "#35618D",
                "type": "color"
            },
            "700": {
                "value": "#2B4764",
                "type": "color"
            },
            "800": {
                "value": "#1F3042",
                "type": "color"
            },
            "900": {
                "value": "#151F28",
                "type": "color"
            }
        }
    }
}

Palettes built on #2378CD

Color Lab

Pairs with #2378CD

UI roles & guardrails

In real applications

Scales

Every model

Export