What color is #310DA5?

#310DA5 is a dark, vivid indigo. In RGB it is rgb(49, 13, 165), and in HSL hsl(254, 85%, 35%).

Is #310DA5 accessible as text?

On white, #310DA5 has a contrast ratio of 12.13:1 (passes WCAG AA for body text); on black it is 1.73:1 (fails). For text placed on #310DA5, use white for the best readability.

What is the closest Tailwind color to #310DA5?

The nearest Tailwind CSS token is indigo-800 (#372AAC).

What colors go well with #310DA5?

#310DA5 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #82A50D. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #310DA5 below.

Is #310DA5 good for buttons?

#310DA5 works well for buttons and highlights, but use white text on #310DA5 — black text only reaches 1.73:1, below the 4.5:1 needed for normal-size labels.

Is #310DA5 the same as CSS mediumblue?

No — #310DA5 is not the CSS named color mediumblue, but mediumblue (#0000CD) is the closest CSS named color.

#310DA5 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #310DA5

Not just a swatch — here's how #310DA5 works with other colors. Named schemes with #310DA5 in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #310DA5 Anchor #141210 Accent #DC9758 Secondary #262833 Surface #F3ECE3

Zaffre 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.

Moody Editorial Color · 5 colors

Color #310DA5 Anchor #2A2A2E Secondary #6E6E74 Surface #EEE5DB Accent #290059

Zaffre 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 Zaffre.

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #310DA5 Secondary #595E8C Support #9D9088 Ink #18140F

Zaffre 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 Zaffre carrying the quiet middle.

Coastal Morning Lead · 5 colors

Lead #310DA5 Accent #A5C4C2 Surface #EAD5BF Secondary #9AA0A1 Anchor #22344A

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

Sunset Warmth Glow · 5 colors

Glow #310DA5 Secondary #E86A71 Accent #F6934E Anchor #583B57 Surface #F7E7D7

Zaffre 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 #310DA5 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 17/100

Cool

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

Softness 23/100

Low

Firm and assertive — carries weight and contrast.

Depth 69/100

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 17/100

Very low

Clean and current — no dusty, aged cast.

Luxury 62/100

High

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

Brand distinctiveness 81/100

Very high

Bold and ownable — memorable as a primary brand color.

UI accent fit 49/100

Moderate

Workable accent with care around contrast.

Surface fit 17/100

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 #310DA5

For UI

For branding

For interior

For fashion

People also use #310DA5 with

Cerulean Mauveine Olive Drab Gainsboro Russian Violet

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 12.1:1. Use

Subtle surface Use #D3CAF2 for cards and hover fills. Tint 80

Avoid beside #630DA5 — 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 #310DA5 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: #310DA5;
  --color-base-rgb: 49 13 165;
  --color-base-oklch: oklch(35.7% 0.209 278.1);
  --color-50: #F4F0FE;
  --color-100: #E1D8FD;
  --color-200: #C4B4F9;
  --color-300: #9A81EE;
  --color-400: #7353DF;
  --color-500: #5230C5;
  --color-600: #452C96;
  --color-700: #35256A;
  --color-800: #261C45;
  --color-900: #18132A;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  zaffre: {
    50: '#F4F0FE',
    100: '#E1D8FD',
    200: '#C4B4F9',
    300: '#9A81EE',
    400: '#7353DF',
    500: '#5230C5',
    600: '#452C96',
    700: '#35256A',
    800: '#261C45',
    900: '#18132A',
  },
}

$base: #310DA5;
$base-ink: #FFFFFF;
$base-50: #F4F0FE;
$base-100: #E1D8FD;
$base-200: #C4B4F9;
$base-300: #9A81EE;
$base-400: #7353DF;
$base-500: #5230C5;
$base-600: #452C96;
$base-700: #35256A;
$base-800: #261C45;
$base-900: #18132A;
$base-hover: #270B84;
$base-subtle: #BCADED;

{
    "color": {
        "base": {
            "value": "#310DA5",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F0FE",
                "type": "color"
            },
            "100": {
                "value": "#E1D8FD",
                "type": "color"
            },
            "200": {
                "value": "#C4B4F9",
                "type": "color"
            },
            "300": {
                "value": "#9A81EE",
                "type": "color"
            },
            "400": {
                "value": "#7353DF",
                "type": "color"
            },
            "500": {
                "value": "#5230C5",
                "type": "color"
            },
            "600": {
                "value": "#452C96",
                "type": "color"
            },
            "700": {
                "value": "#35256A",
                "type": "color"
            },
            "800": {
                "value": "#261C45",
                "type": "color"
            },
            "900": {
                "value": "#18132A",
                "type": "color"
            }
        }
    }
}

Palettes built on #310DA5

Color Lab

Pairs with #310DA5

UI roles & guardrails

In real applications

Scales

Every model

Export