#1D3488#1D3488

#1D3488 is a dark, vivid blue. Relative luminance 0.045; OKLCH L 36.4% C 0.143 H 267.1°. Best body text is #FFFFFF at 11.06:1 contrast (WCAG AA passes).

Color values

HEX	#1D3488
RGB	rgb(29, 52, 136)
HSL	hsl(227, 65%, 32%)
HSV	hsv(227, 79%, 53%)
CMYK	cmyk(78.7%, 61.8%, 0%, 46.7%)
CIE-LAB	lab(25.24, 23.26, -49.42)
CIE-LCH	lch(25.24, 54.62, 295.20°)
OKLab	oklab(36.44% -0.0073 -0.1428)
OKLCH	oklch(36.44% 0.143 267.1)
XYZ	xyz(6.1771, 4.4941, 23.8297)
Luminance	0.0449 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3488 #88711D

analogous

#1D6988 #1D3488 #3C1D88

triadic

#1D3488 #881D34 #34881D

tetradic

#1D3488 #881D69 #88711D #1D883C

square

#1D3488 #881D69 #88711D #1D883C

split-complementary

#1D3488 #883C1D #69881D

monochromatic

#070D23 #122156 #1D3488 #2847BA #4867D8

Accessibility & contrast

On white

11.06

#1D3488 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#1D3488 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3488

11.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3488	#FFFFFF	#000000	##FFFFFF
##1D3488	1.00	11.06	1.90	11.06
#FFFFFF	11.06	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00418B

Deuteranopia (green-blind)

#003786

Tritanopia (blue-blind)

#004958

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #1d3488;
/* rgb */ color: rgb(29, 52, 136);
/* oklch */ color: oklch(36.4% 0.143 267.1);

Tailwind

colors: {
  custom: {
    50: '#6b6bab',
    500: '#1d3488',
    950: '#000000',
  },
}

SCSS

$custom: #1d3488;
$custom-light: #6b6bab;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3488",
  "rgb": {
    "r": 29,
    "g": 52,
    "b": 136
  },
  "hsl": {
    "h": 227.103,
    "s": 64.848,
    "l": 32.353
  },
  "oklch": {
    "l": 0.36436,
    "c": 0.14298,
    "h": 267.1
  },
  "luminance": 0.04495
}

Semantic roles & 50–950 ramp

primary

#1D3488

secondary

#BAA147

accent

#C440E8

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#080610

muted

#7A7A7F

Preview Lab

Preview with #1D3488

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

Preview Lab → · Contrast checker → · Palette generator →