What color is #123EDD?

#123EDD is a medium, vivid blue. In RGB it is rgb(18, 62, 221), and in HSL hsl(227, 85%, 47%).

Is #123EDD accessible as text?

On white, #123EDD has a contrast ratio of 7.61:1 (passes WCAG AA for body text); on black it is 2.76:1 (fails). For text placed on #123EDD, use white for the best readability.

What is the closest Tailwind color to #123EDD?

The nearest Tailwind CSS token is blue-700 (#1447E6).

What colors go well with #123EDD?

#123EDD pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #DEB212. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #123EDD below.

Is #123EDD good for buttons?

#123EDD works well for buttons and highlights, but use white text on #123EDD — black text only reaches 2.76:1, below the 4.5:1 needed for normal-size labels.

Is #123EDD the same as CSS blue?

No — #123EDD is not the CSS named color blue, but blue (#0000FF) is the closest CSS named color.

#123EDD Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #123EDD

Not just a swatch — here's how #123EDD works with other colors. Named schemes with #123EDD in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #123EDD Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #396DFA

Cerulean is the vivid signal in this product UI — on a near-black surface with cool white, a slate grey and a lighter tint of Cerulean.

Coastal Morning Lead · 5 colors

Lead #123EDD Accent #A5C4C2 Surface #DDDBBF Secondary #9AA0A1 Anchor #21344A

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

Berry & Cream Lead · 5 colors

Lead #123EDD Surface #F6E5D8 Anchor #5B2144 Accent #E5C2CA Secondary #322B2F

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

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #123EDD Secondary #6881B5 Support #9D8F88 Ink #18140F

Cerulean 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 Cerulean carrying the quiet middle.

Sunset Warmth Glow · 5 colors

Glow #123EDD Secondary #E76A75 Accent #F79251 Anchor #573B58 Surface #F7E7D7

Cerulean glows at the center of this sunset palette, joined by coral and gold, deepened by a plum anchor and cooled with cream.

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Color Lab

How #123EDD 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 26/100

Low

Firm and assertive — carries weight and contrast.

Depth 59/100

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 9/100

Very low

Clean and current — no dusty, aged cast.

Luxury 51/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 93/100

Very high

Bold and ownable — memorable as a primary brand color.

UI accent fit 61/100

High

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

Surface fit 10/100

Very low

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

Print safety 56/100

Moderate

Prints close, with a slight loss of vibrancy.

Pairs with #123EDD

For UI

For branding

For interior

For fashion

People also use #123EDD with

Lagoon Blue Han Purple Goldenrod 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 7.6:1. Use

Subtle surface Use #D3DBF5 for cards and hover fills. Tint 80

Avoid beside #2A12DE — 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 #123EDD 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: #123EDD;
  --color-base-rgb: 18 62 221;
  --color-base-oklch: oklch(46.4% 0.242 264.8);
  --color-50: #F0F3FE;
  --color-100: #D8E0FD;
  --color-200: #B4C3F9;
  --color-300: #8199EE;
  --color-400: #5371DF;
  --color-500: #3050C5;
  --color-600: #2C4396;
  --color-700: #25346A;
  --color-800: #1C2545;
  --color-900: #13182A;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  cerulean: {
    50: '#F0F3FE',
    100: '#D8E0FD',
    200: '#B4C3F9',
    300: '#8199EE',
    400: '#5371DF',
    500: '#3050C5',
    600: '#2C4396',
    700: '#25346A',
    800: '#1C2545',
    900: '#13182A',
  },
}

$base: #123EDD;
$base-ink: #FFFFFF;
$base-50: #F0F3FE;
$base-100: #D8E0FD;
$base-200: #B4C3F9;
$base-300: #8199EE;
$base-400: #5371DF;
$base-500: #3050C5;
$base-600: #2C4396;
$base-700: #25346A;
$base-800: #1C2545;
$base-900: #13182A;
$base-hover: #0E32B1;
$base-subtle: #BCC8F1;

{
    "color": {
        "base": {
            "value": "#123EDD",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0F3FE",
                "type": "color"
            },
            "100": {
                "value": "#D8E0FD",
                "type": "color"
            },
            "200": {
                "value": "#B4C3F9",
                "type": "color"
            },
            "300": {
                "value": "#8199EE",
                "type": "color"
            },
            "400": {
                "value": "#5371DF",
                "type": "color"
            },
            "500": {
                "value": "#3050C5",
                "type": "color"
            },
            "600": {
                "value": "#2C4396",
                "type": "color"
            },
            "700": {
                "value": "#25346A",
                "type": "color"
            },
            "800": {
                "value": "#1C2545",
                "type": "color"
            },
            "900": {
                "value": "#13182A",
                "type": "color"
            }
        }
    }
}

Palettes built on #123EDD

Color Lab

Pairs with #123EDD

UI roles & guardrails

In real applications

Scales

Every model

Export