What color is #2F28EB?

#2F28EB is a medium, vivid blue. In RGB it is rgb(47, 40, 235), and in HSL hsl(242, 83%, 54%).

Is #2F28EB accessible as text?

On white, #2F28EB has a contrast ratio of 8.00:1 (passes WCAG AA for body text); on black it is 2.62:1 (fails). For text placed on #2F28EB, use white for the best readability.

What is the closest Tailwind color to #2F28EB?

The nearest Tailwind CSS token is indigo-700 (#432DD7).

What colors go well with #2F28EB?

#2F28EB pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #E5EB28. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #2F28EB below.

Is #2F28EB good for buttons?

#2F28EB works well for buttons and highlights, but use white text on #2F28EB — black text only reaches 2.62:1, below the 4.5:1 needed for normal-size labels.

Is #2F28EB the same as CSS blue?

No — #2F28EB is not the CSS named color blue, but blue (#0000FF) is the closest CSS named color.

#2F28EB Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #2F28EB

Not just a swatch — here's how #2F28EB works with other colors. Named schemes with #2F28EB in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #2F28EB Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #4962FF

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

Coastal Morning Lead · 5 colors

Lead #2F28EB Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

Ultramarine 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 #2F28EB Surface #F6E5D8 Anchor #5B2143 Accent #E5C2C9 Secondary #322B2F

Ultramarine 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 #2F28EB Secondary #6B7DBA Support #9D8F88 Ink #18140F

Ultramarine 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 Ultramarine carrying the quiet middle.

Sunset Warmth Glow · 5 colors

Glow #2F28EB Secondary #E86A73 Accent #F69250 Anchor #573B58 Surface #F7E7D7

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

Build a working theme in the generator →

Color Lab

How #2F28EB 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 12/100

Cool

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

Softness 23/100

Low

Firm and assertive — carries weight and contrast.

Depth 61/100

High

Mid depth — usable as an accent or a muted ground.

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 1/100

Very low

Clean and current — no dusty, aged cast.

Luxury 49/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 100/100

Very high

Bold and ownable — memorable as a primary brand color.

UI accent fit 47/100

Moderate

Workable accent with care around contrast.

Surface fit 10/100

Very low

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

Print safety 54/100

Moderate

Prints close, with a slight loss of vibrancy.

Pairs with #2F28EB

For UI

For branding

For interior

For fashion

People also use #2F28EB with

Cornflower Blue Blue Violet Pear 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 8.0:1. Use

Subtle surface Use #DADAF6 for cards and hover fills. Tint 80

Avoid beside #7028EB — 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 #2F28EB 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: #2F28EB;
  --color-base-rgb: 47 40 235;
  --color-base-oklch: oklch(46.2% 0.270 270.3);
  --color-50: #F1F0FE;
  --color-100: #DAD9FD;
  --color-200: #B7B4F8;
  --color-300: #8682ED;
  --color-400: #5954DE;
  --color-500: #3631C3;
  --color-600: #312D95;
  --color-700: #282669;
  --color-800: #1E1C44;
  --color-900: #14132A;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  ultramarine: {
    50: '#F1F0FE',
    100: '#DAD9FD',
    200: '#B7B4F8',
    300: '#8682ED',
    400: '#5954DE',
    500: '#3631C3',
    600: '#312D95',
    700: '#282669',
    800: '#1E1C44',
    900: '#14132A',
  },
}

$base: #2F28EB;
$base-ink: #FFFFFF;
$base-50: #F1F0FE;
$base-100: #DAD9FD;
$base-200: #B7B4F8;
$base-300: #8682ED;
$base-400: #5954DE;
$base-500: #3631C3;
$base-600: #312D95;
$base-700: #282669;
$base-800: #1E1C44;
$base-900: #14132A;
$base-hover: #1913CA;
$base-subtle: #C7C6F2;

{
    "color": {
        "base": {
            "value": "#2F28EB",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1F0FE",
                "type": "color"
            },
            "100": {
                "value": "#DAD9FD",
                "type": "color"
            },
            "200": {
                "value": "#B7B4F8",
                "type": "color"
            },
            "300": {
                "value": "#8682ED",
                "type": "color"
            },
            "400": {
                "value": "#5954DE",
                "type": "color"
            },
            "500": {
                "value": "#3631C3",
                "type": "color"
            },
            "600": {
                "value": "#312D95",
                "type": "color"
            },
            "700": {
                "value": "#282669",
                "type": "color"
            },
            "800": {
                "value": "#1E1C44",
                "type": "color"
            },
            "900": {
                "value": "#14132A",
                "type": "color"
            }
        }
    }
}

Palettes built on #2F28EB

Color Lab

Pairs with #2F28EB

UI roles & guardrails

In real applications

Scales

Every model

Export