#1A3571#1A3571

#1A3571 is a dark, moderate blue. Relative luminance 0.040; OKLCH L 34.5% C 0.109 H 263.5°. Best body text is #FFFFFF at 11.72:1 contrast (WCAG AA passes).

Color values

HEX	#1A3571
RGB	rgb(26, 53, 113)
HSL	hsl(221, 63%, 27%)
HSV	hsv(221, 77%, 44%)
CMYK	cmyk(77%, 53.1%, 0%, 55.7%)
CIE-LAB	lab(23.53, 12.85, -37.68)
CIE-LCH	lch(23.53, 39.82, 288.83°)
OKLab	oklab(34.52% -0.0123 -0.1083)
OKLCH	oklch(34.52% 0.109 263.5)
XYZ	xyz(4.6787, 3.9576, 16.1369)
Luminance	0.0396 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1A3571 #71561A

analogous

#1A6171 #1A3571 #2A1A71

triadic

#1A3571 #711A35 #35711A

tetradic

#1A3571 #711A61 #71561A #1A712A

square

#1A3571 #711A61 #71561A #1A712A

split-complementary

#1A3571 #712A1A #61711A

monochromatic

#060C19 #0F1E3F #1A3571 #254CA3 #3565D0

Accessibility & contrast

On white

11.72

#1A3571 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.79

#1A3571 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1A3571

11.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1A3571	#FFFFFF	#000000	##FFFFFF
##1A3571	1.00	11.72	1.79	11.72
#FFFFFF	11.72	1.00	21.00	1.00
#000000	1.79	21.00	1.00	21.00
##FFFFFF	11.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#103C73

Deuteranopia (green-blind)

#003470

Tritanopia (blue-blind)

#00434D

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1a3571;
/* rgb */ color: rgb(26, 53, 113);
/* oklch */ color: oklch(34.5% 0.109 263.5);

Tailwind

colors: {
  custom: {
    50: '#646b9a',
    500: '#1a3571',
    950: '#000000',
  },
}

SCSS

$custom: #1a3571;
$custom-light: #646b9a;
$custom-dark: #000000;

JSON

{
  "hex": "#1a3571",
  "rgb": {
    "r": 26,
    "g": 53,
    "b": 113
  },
  "hsl": {
    "h": 221.379,
    "s": 62.59,
    "l": 27.255
  },
  "oklch": {
    "l": 0.34524,
    "c": 0.10904,
    "h": 263.5
  },
  "luminance": 0.03958
}

Semantic roles & 50–950 ramp

primary

#1A3571

secondary

#A68741

accent

#B342E6

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060E

muted

#7A7A7E

Preview Lab

Preview with #1A3571

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

Preview Lab → · Contrast checker → · Palette generator →