#1D3387#1D3387

#1D3387 is a dark, vivid blue. Relative luminance 0.044; OKLCH L 36.1% C 0.143 H 267.3°. Best body text is #FFFFFF at 11.20:1 contrast (WCAG AA passes).

Color values

HEX	#1D3387
RGB	rgb(29, 51, 135)
HSL	hsl(228, 65%, 32%)
HSV	hsv(228, 79%, 53%)
CMYK	cmyk(78.5%, 62.2%, 0%, 47.1%)
CIE-LAB	lab(24.88, 23.56, -49.38)
CIE-LCH	lch(24.88, 54.71, 295.50°)
OKLab	oklab(36.14% -0.0066 -0.1427)
OKLCH	oklch(36.14% 0.143 267.3)
XYZ	xyz(6.0622, 4.3775, 23.4424)
Luminance	0.0438 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3387 #87711D

analogous

#1D6887 #1D3387 #3C1D87

triadic

#1D3387 #871D33 #33871D

tetradic

#1D3387 #871D68 #87711D #1D873C

square

#1D3387 #871D68 #87711D #1D873C

split-complementary

#1D3387 #873C1D #68871D

monochromatic

#070D22 #122055 #1D3387 #2846B9 #4765D7

Accessibility & contrast

On white

11.20

#1D3387 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#1D3387 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3387

11.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3387	#FFFFFF	#000000	##FFFFFF
##1D3387	1.00	11.20	1.88	11.20
#FFFFFF	11.20	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00408A

Deuteranopia (green-blind)

#003685

Tritanopia (blue-blind)

#004858

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1d3387;
/* rgb */ color: rgb(29, 51, 135);
/* oklch */ color: oklch(36.1% 0.143 267.3);

Tailwind

colors: {
  custom: {
    50: '#6b6aab',
    500: '#1d3387',
    950: '#000000',
  },
}

SCSS

$custom: #1d3387;
$custom-light: #6b6aab;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3387",
  "rgb": {
    "r": 29,
    "g": 51,
    "b": 135
  },
  "hsl": {
    "h": 227.547,
    "s": 64.634,
    "l": 32.157
  },
  "oklch": {
    "l": 0.36141,
    "c": 0.14285,
    "h": 267.3
  },
  "luminance": 0.04378
}

Semantic roles & 50–950 ramp

primary

#1D3387

secondary

#B9A246

accent

#C540E8

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#080610

muted

#7A7A7F

Preview Lab

Preview with #1D3387

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →