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blue · cool

#0d032f

a deep, electric blue · cool · closest name: Midnight Blue

Token name suggestion: Ink Sapphire

RGB
13, 3, 47
HSL
254°, 88%, 10%
CMYK
72, 94, 0, 82
Luminance
0.0036

#0d032f is a deep electric blue, 254° on the wheel and 76/100 on the cool side. Put white text on it (19.60:1). As text it scores 19.60:1 on white — safe at any size. Nearest name is Midnight Blue, nearest Tailwind family is slate.

hsl(254 88% 10%)rgb(13 3 47)Base step 950AAA inkCool

At a glance

Every number on this page in one read: what #0d032f is made of, how bright it looks, and which way it leans.

Hex
#0d032f
Hue
254°
blue
Saturation
88%
electric
Lightness
10%
deep
Brightness
18%
HSV value
Perceived
7%
weighted brightness
Luminance
0.0036
WCAG relative
Temperature
Cool
76/100 cool
Color family
Blue
Tone
Electric
Best ink
White
19.60:1
Closest name
Midnight Blue
ΔE2000 12.4
Chroma
29.6
LCH, 0–130ish
OKLCH L
0.163
perceptual lightness
Tailwind
slate
500 · ΔE 35.2
Web-safe
#000033
nearest of 216
Where it sits
Hue254° of 360°
Saturation88%
Lightness10%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #0d032f.

Temperature
Warm ← → Cool76% cool

Reads cool. Warm and cool siblings keep the same lightness, so you can swap one in without redoing your contrast maths.

Luminance by channel
Red24%
Green18%
Blue58%

Green carries most of what the eye calls brightness — that is why WCAG weights it 0.7152.

Every format

HEX#0d032f
HEX (8-digit)#0d032fff
RGBrgb(13, 3, 47)
RGBArgba(13, 3, 47, 1)
HSLhsl(254, 88%, 10%)
HSV / HSBhsv(254, 94%, 18%)
HWBhwb(254 1% 82%)
CMYKcmyk(72%, 94%, 0%, 82%)
LABlab(3.2 15.3 -25.3)
LCHlch(3.2 29.6 301.1)
OKLCHoklch(0.163 0.083 284.6)
XYZ (D65)xyz(0.71, 0.36, 2.72)
Decimal852783
Display P3color(display-p3 0.051 0.012 0.184)
Web-safe#000033

Copy-ready code

every platformclick to select
/* CSS */
color: #0d032f;
background-color: #0d032f;
/* CSS custom property */
--brand: #0d032f;
/* Tailwind (arbitrary) */
class="text-[#0d032f] bg-[#0d032f]"
/* SCSS */
$brand: #0d032f;
/* SwiftUI */
Color(red: 0.051, green: 0.012, blue: 0.184)
/* UIKit */
UIColor(red: 0.051, green: 0.012, blue: 0.184, alpha: 1)
/* Android XML */
<color name="brand">#0D032F</color>
/* Android Compose */
Color(0xFF0D032F)
/* Flutter */
Color(0xFF0D032F)
/* Python / OpenCV (BGR) */
(47, 3, 13)
/* Python / PIL (RGB) */
(13, 3, 47)
/* Java AWT */
new Color(13, 3, 47)
/* .NET */
Color.FromArgb(255, 13, 3, 47)
/* OpenGL / Unity (0–1) */
(0.0510f, 0.0118f, 0.1843f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{13,3,47}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #0d032f 85%, white);
border-color: color-mix(in oklab, #0d032f 40%, transparent);
/* theme-aware in one line */
color: light-dark(#210878, #D9D3EE);
/* relative colour syntax */
--hover: hsl(from #0d032f h s calc(l - 7));

Design tokens

The same ramp in the four formats a team actually needs. Paste one and the whole palette lands with it.

css custom propertiesclick to select
:root {
  --brand-50: #F4F2FD;
  --brand-100: #EAE5FA;
  --brand-200: #D0C4F8;
  --brand-300: #AC96F8;
  --brand-400: #8261F5;
  --brand-500: #592CF2;
  --brand-600: #400FE6;
  --brand-700: #350CC0;
  --brand-800: #2A0A99;
  --brand-900: #220C6F;
  --brand-950: #0d032f;
  --brand: #0d032f;
  --brand-ink: #ffffff;
  --brand-surface: #F6F4FA;
  --brand-border: #CAC0ED;
  --brand-hover: #04010D;
  --brand-pressed: #000000;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #171424;
    --brand-ink: #D9D3EE;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F4F2FD',
        100: '#EAE5FA',
        200: '#D0C4F8',
        300: '#AC96F8',
        400: '#8261F5',
        500: '#592CF2',
        600: '#400FE6',
        700: '#350CC0',
        800: '#2A0A99',
        900: '#220C6F',
        950: '#0d032f',
        DEFAULT: '#0d032f',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F4F2FD,
  '100': #EAE5FA,
  '200': #D0C4F8,
  '300': #AC96F8,
  '400': #8261F5,
  '500': #592CF2,
  '600': #400FE6,
  '700': #350CC0,
  '800': #2A0A99,
  '900': #220C6F,
  '950': #0d032f,
);
$brand-base: #0d032f;
$brand-ink: #ffffff;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F4F2FD", "$type": "color" },
      "100": { "$value": "#EAE5FA", "$type": "color" },
      "200": { "$value": "#D0C4F8", "$type": "color" },
      "300": { "$value": "#AC96F8", "$type": "color" },
      "400": { "$value": "#8261F5", "$type": "color" },
      "500": { "$value": "#592CF2", "$type": "color" },
      "600": { "$value": "#400FE6", "$type": "color" },
      "700": { "$value": "#350CC0", "$type": "color" },
      "800": { "$value": "#2A0A99", "$type": "color" },
      "900": { "$value": "#220C6F", "$type": "color" },
      "950": { "$value": "#0d032f", "$type": "color" }
    },
    "brandInk": { "$value": "#ffffff", "$type": "color" }
  }
}

Best text color

Only one of black and white can be right. This is the one, with the number that proves it.

Readable at a glance#ffffff on #0d032f · 19.60:1
Use #ffffffAAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 19.60:1 · recommended
AA pass · AA large pass · AAA pass
Aa
Black text · 1.07:1
AA fail · AA large fail · AAA fail
Reading the other direction: #0d032f as text scores 19.60:1 on white and 1.07:1 on black.
Best tinted ink on it, if plain black or white feels flat: #ECE7FD at 16.26:1.

Make it accessible

A contrast checker tells you that you failed. This tells you what to ship instead — same hue, same saturation, lightness moved only as far as WCAG demands.

The quick fox
#0d032f · 19.60:1
AA on whitealready passes
#0d032f
The quick fox
#0d032f · 19.60:1
AAA on whitealready passes
#0d032f
The quick fox
#7E5BF5 · 4.70:1
AA on black+56% L
#7E5BF5
The quick fox
#A086F7 · 7.25:1
AAA on black+65% L
#A086F7

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #0D032F is enough for headings on white. Non-text elements such as icons, chart strokes and focus rings also sit at 3:1 under WCAG 2.2 (1.4.11).

Accessibility — WCAG contrast

Aa
#0d032f on white: 19.60:1
AA ✓ pass · AA-large · AAA
Aa
#0d032f on black: 1.07:1
AA ✗ fail · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #0d032f as text on that neutral, and that neutral as text on #0d032f.

NeutralRatioBoth directions
White19.60:1AaAa
Slate 5018.74:1AaAa
Slate 10017.90:1AaAa
Slate 20015.90:1AaAa
Slate 30013.20:1AaAa
Slate 4007.65:1AaAa
Slate 5004.12:1AaAa
Slate 6002.59:1AaAa
Slate 7001.89:1AaAa
Slate 8001.34:1AaAa
Slate 9001.10:1AaAa
Black1.07:1AaAa
Colour vision deficiency
true color
protanopia · #000D30
deuteranopia · #000A2E
tritanopia · #000F18

Roughly one man in twelve has some form of colour vision deficiency. If any of the three panels above is hard to tell apart from a neighbouring colour in your palette, add a shape, an icon or a label so the meaning does not rest on hue alone.

Color scale — 50 to 950

A Tailwind-shaped ramp built around this exact hex. #0d032f is pinned to step 950; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.

#F4F2FD
#EAE5FA
#D0C4F8
#AC96F8
#8261F5
#592CF2
#400FE6
#350CC0
#2A0A99
#220C6F
#0d032f
Base = 950Lightest = 50 · #F4F2FDDarkest = 950 · #0d032fText step on white = 500
Perceptual ramp — OKLCH

The same eleven steps expressed in OKLCH, where equal lightness numbers actually look equally spaced. HSL ramps go muddy in the yellows and washed out in the blues; this one does not. Modern browsers render it natively — the hex ramp above is the fallback.

50100200300400500600700800900950
oklch tokensclick to select
:root {
  --brand-50: oklch(0.97 0.021 284.6);
  --brand-100: oklch(0.94 0.033 284.6);
  --brand-200: oklch(0.88 0.050 284.6);
  --brand-300: oklch(0.80 0.065 284.6);
  --brand-400: oklch(0.72 0.077 284.6);
  --brand-500: oklch(0.64 0.083 284.6);
  --brand-600: oklch(0.56 0.083 284.6);
  --brand-700: oklch(0.48 0.078 284.6);
  --brand-800: oklch(0.40 0.070 284.6);
  --brand-900: oklch(0.32 0.058 284.6);
  --brand-950: oklch(0.24 0.046 284.6);
}

Colors that work with #0d032f

Not a palette — a role sheet. Each swatch answers one question you will hit while building the component.

Text on it#ffffff
White wins here
Surface#F6F4FA
Tinted page background
Border#CAC0ED
Hairlines and dividers
Muted text#5D4B9B
Captions on the surface
Accent#302F02
Second voice, not a rival
Dark variant#210878
Hover, pressed, headers
Light variant#ECE7FD
Selected rows, tints
Dark surface#171424
Dark-mode background
Hover#04010D
One step down in lightness
Pressed#000000
Two steps down
Disabled#473F63
Chroma pulled out
Focus ring#100146
Offset from the fill so it reads
Light mode
Everything in its place

Surface, border, heading and body all derive from this one hue, so the screen stays coherent without a second palette.

Primary actionSecondaryBadge
Dark mode
Same hue, inverted

Lightness flips, hue holds. The accent stays the anchor in both themes.

Primary actionSecondaryAccent

In real components

The same eight roles, wired into the interface patterns you will actually build with them. Every state below is a computed value, not a mock-up.

Buttons and states
Save changesHoverPressedDisabled
OutlineSubtleLinkFocused
Form field
you@company.com

Focus ring uses the light variant so the field still reads as one shape.

Send me product updates
Notice
Your export is ready

The file stays available for seven days. Download it before it expires.

NewBetaDraft
Data
Storage used68%
Acme LtdActive
NorthwindTrial
GlobexActive

How to use #0d032f

Derived from its contrast, chroma and lightness — not from taste.

Works well for
  • Body text and links on white
  • Primary buttons and calls to action
  • Focus rings, active and selected states
  • Headers, footers and dark-mode surfaces
  • Brand accents, badges and data highlights
Use with care
  • Text on black or near-black surfaces
  • Full-page backgrounds — tiring over long sessions
  • Black text placed on it
  • Pairing with a same-lightness hue — edges vibrate
Minimum size as text on white
Any size
Safe as a fill behind white type
Yes
Safe as a 1px border on white
Yes

Meaning and mood

What a colour in this family tends to signal, and how this particular chroma and lightness change the reading.

trustedcalmcompetentcorporate

The default of institutions for a reason: blue is read as stable and safe across nearly every culture that has been surveyed.

At this chroma the association is amplified — it will dominate anything placed beside it, so give it space and use it sparingly. The low lightness adds weight and formality.

Worth knowing

It is also the most crowded hue on the web. Distinctiveness has to come from your other choices.

Reads as
  • FormalityHigh
  • EnergyHigh
  • Weight90/100
  • TemperatureCool
  • ApproachabilityReserved

Colour associations are cultural and vary by market. Treat these as a starting point for a conversation with your audience, not a finding about them.

Similar colors

One move away from this hex in each direction. Every swatch is its own page.

Color relationships

The wheel positions with their names attached, so you can grab the one you actually need.

Complementary#252F03
Analogous left#030F2F
Analogous right#23032F
Split-complement 1#2F2303
Split-complement 2#0F2F03
Triadic 1#2F0D03
Triadic 2#032F0D
Tetradic#2F030F
On the wheel
Base+30°−30°+120°+240°+180°254°

#0d032f sits at 254°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red5.1%
Green1.2%
Blue18.4%
R · 0–255
13
0x0d
G · 0–255
3
0x03
B · 0–255
47
0x2f

CMYK percentages

Cyan72.3%
Magenta93.6%
Yellow0.0%
Key (black)81.6%

Total ink coverage is 247%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#0d032f text on a black background

contrast 1.07:1

Card sample

#0d032f text on a white background

contrast 19.60:1

Card sample

#0d032f on grey

17.90:1

#0d032f on its own surface

17.96:1

#0d032f on its dark surface

1.08:1

CSS3 live lab

Text font color

The quick brown fox

color: #0d032f;
Background color
Panel with #0d032f background
background-color: #0d032f;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #0d032f;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(13, 3, 47, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(13, 3, 47, 0.45);
Border & gradient
Gradient panel
border: 3px solid #0d032f;
background: linear-gradient(135deg, #0d032f, #2A032F);
Gradient text

Gradient headline

background: linear-gradient(90deg, #0d032f, #2F0329);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #0d032f;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #0d032f;
caret-color: #0d032f;
Left rule
Pull quote or callout
border-left: 4px solid #0d032f;
Ring + tint
Selected chip
background: #ECE7FD;
box-shadow: inset 0 0 0 2px #0d032f;
Conic badge
68%
background: conic-gradient(#0d032f 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #0d032f over white; the bottom row is the same alpha over a checkerboard, so you can see what survives on a photo or a video.

Bottom row of hexes is the flattened result over white — use those when a design tool refuses transparency, or when you need a solid fallback.

alpha in every syntaxclick to select
rgba(13, 3, 47, 0.5)
rgb(13 3 47 / 50%)
#0d032f80
hsl(254 88% 10% / 50%)
color-mix(in srgb, #0d032f 50%, transparent)
Alpha8-digit hexFlat on white
10%#0d032f1a#E7E6EA
20%#0d032f33#CFCDD5
40%#0d032f66#9E9AAC
60%#0d032f99#6E6882
80%#0d032fcc#3D3559

Gradients from #0d032f

Six recipes, each built from this hex and shown with the exact CSS that produced it.

Elevation
Same hue, three lightnesses — safe anywhere
background: linear-gradient(135deg, #1D0769, #0d032f 45%, #210878);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #0d032f, #120112);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #0d032f, #252F03);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #250985 0%, #0d032f 45%, #210878 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F6F4FA, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #06265F 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #3E054C 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #210878 0%, transparent 65%), #0d032f;

Monochromatic scale

Palettes built from #0d032f

Shades — darker

Tints — lighter

Tones — desaturated

Color harmonies

Nearest named colors

Ranked with CIEDE2000 across all 139 CSS keywords. Under ΔE 2 the eye stops telling them apart; over ΔE 10 they are plainly different colors.

#0d032f in the real world

Where a color in this family tends to land, and the interface roles it is usually asked to play.

Industries
TechnologyFinanceHealthcareEnterprise SaaS
Common UI roles
ButtonsLinksFocus statesCharts
Print note

Sits outside most CMYK gamuts — expect a duller press result, or specify a spot ink.

On screens

Very dark values collapse into each other on cheap panels — leave more lightness between your darkest steps than the numbers suggest.

In dark mode

Too dim on dark surfaces at 1.07:1 — lift it to #7E5BF5 for body text, or reserve it for fills.

Explore nearby colors

Small, deliberate steps away from this hex — useful when you are hunting for the version of a colour that finally feels right.

#0d032f, answered

What color is #0d032f?

#0d032f is a deep electric blue, closest to Midnight Blue (ΔE2000 12.4). It sits at 254° on the hue wheel with 88% saturation and 10% lightness, which reads as cool.

What is the RGB value of #0d032f?

rgb(13, 3, 47) — 13 red, 3 green and 47 blue out of 255, or 5.1% / 1.2% / 18.4% by channel.

What is #0d032f in HSL and HSV?

hsl(254, 88%, 10%) and hsv(254, 94%, 18%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #0d032f a light or a dark color?

It is a dark color. Relative luminance is 0.0036 and perceived brightness is 7%, so white text on it reaches 19.60:1.

Should I use black or white text on #0d032f?

White. It scores 19.60:1 against #0d032f, versus 1.07:1 for black — AAA at any size.

Is #0d032f accessible on a white background?

#0d032f on white scores 19.60:1, which clears AAA at every size.

What is the complementary color of #0d032f?

#252F03 sits directly opposite on the wheel. Softer options are the split-complements #2F2303 and #0F2F03, which give the same contrast with far less vibration.

What colors go well with #0d032f?

For interface work: #F6F4FA as the surface, #CAC0ED for borders, #5D4B9B for secondary text, #302F02 as an accent and #210878 for hover and pressed states. For a palette, the analogous pair #030F2F and #23032F stays calm, while #252F03 is the loudest partner.

What is #0d032f in CMYK for printing?

cmyk(72%, 94%, 0%, 82%). This is a screen-to-ink approximation — a color this saturated sits outside most CMYK gamuts and will print duller than it looks here.

Is #0d032f warm or cool?

Cool — it scores 76 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #1D032F; nudged cooler, #02092F.

Which Tailwind color is closest to #0d032f?

The slate family — its 500 step is #64748b, ΔE2000 35.2 away. That is a visible difference, so define #0d032f as a custom token rather than reaching for the built-in.

How do I use #0d032f in Tailwind CSS?

Inline it as an arbitrary value with bg-[#0d032f] or text-[#0d032f], or register the whole ramp under theme.extend.colors.brand so you get bg-brand-500 and friends. The generated 50–950 scale on this page is ready to paste into your config.

What is #0d032f with 50% opacity?

rgba(13, 3, 47, 0.5), or #0d032f80 in eight-digit hex. Over white that composites to #868197; over black, #070218.

Is #0d032f a web-safe color?

No. The nearest web-safe colour is #000033, ΔE2000 3.1 away. The palette only matters for legacy displays and some email clients now.

What does the color #0d032f mean?

As a blue, it reads trusted, calm, competent. The default of institutions for a reason: blue is read as stable and safe across nearly every culture that has been surveyed. At this chroma the effect is amplified — it will dominate whatever sits beside it.

What gradient works with #0d032f?

The safest is same-hue elevation: linear-gradient(135deg, #1D0769, #0d032f 45%, #210878). For more colour, a short hue run to #120112 keeps it rich without turning muddy.

Work with #0d032f in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #0d032f at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.