#1A3573#1A3573

#1A3573 is a dark, moderate blue. Relative luminance 0.040; OKLCH L 34.7% C 0.112 H 263.8°. Best body text is #FFFFFF at 11.66:1 contrast (WCAG AA passes).

Color values

HEX	#1A3573
RGB	rgb(26, 53, 115)
HSL	hsl(222, 63%, 28%)
HSV	hsv(222, 77%, 45%)
CMYK	cmyk(77.4%, 53.9%, 0%, 54.9%)
CIE-LAB	lab(23.68, 13.68, -38.72)
CIE-LCH	lch(23.68, 41.06, 289.46°)
OKLab	oklab(34.69% -0.0121 -0.1114)
OKLCH	oklch(34.69% 0.112 263.8)
XYZ	xyz(4.7925, 4.0031, 16.7364)
Luminance	0.0400 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1A3573 #73581A

analogous

#1A6173 #1A3573 #2C1A73

triadic

#1A3573 #731A35 #35731A

tetradic

#1A3573 #731A61 #73581A #1A732C

square

#1A3573 #731A61 #73581A #1A732C

split-complementary

#1A3573 #732C1A #61731A

monochromatic

#060C19 #0F1E41 #1A3573 #254CA5 #3665D2

Accessibility & contrast

On white

11.66

#1A3573 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#1A3573 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1A3573

11.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1A3573	#FFFFFF	#000000	##FFFFFF
##1A3573	1.00	11.66	1.80	11.66
#FFFFFF	11.66	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0D3D75

Deuteranopia (green-blind)

#003472

Tritanopia (blue-blind)

#00444E

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1a3573;
/* rgb */ color: rgb(26, 53, 115);
/* oklch */ color: oklch(34.7% 0.112 263.8);

Tailwind

colors: {
  custom: {
    50: '#646b9c',
    500: '#1a3573',
    950: '#000000',
  },
}

SCSS

$custom: #1a3573;
$custom-light: #646b9c;
$custom-dark: #000000;

JSON

{
  "hex": "#1a3573",
  "rgb": {
    "r": 26,
    "g": 53,
    "b": 115
  },
  "hsl": {
    "h": 221.798,
    "s": 63.121,
    "l": 27.647
  },
  "oklch": {
    "l": 0.34687,
    "c": 0.11203,
    "h": 263.8
  },
  "luminance": 0.04004
}

Semantic roles & 50–950 ramp

primary

#1A3573

secondary

#A88941

accent

#B442E6

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060E

muted

#7A7A7E

Preview Lab

Preview with #1A3573

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

Preview Lab → · Contrast checker → · Palette generator →