#1A3183#1A3183

#1A3183 is a dark, vivid blue. Relative luminance 0.041; OKLCH L 35.2% C 0.141 H 266.8°. Best body text is #FFFFFF at 11.60:1 contrast (WCAG AA passes).

Color values

HEX	#1A3183
RGB	rgb(26, 49, 131)
HSL	hsl(227, 67%, 31%)
HSV	hsv(227, 80%, 51%)
CMYK	cmyk(80.2%, 62.6%, 0%, 48.6%)
CIE-LAB	lab(23.85, 23.02, -48.57)
CIE-LCH	lch(23.85, 53.75, 295.36°)
OKLab	oklab(35.23% -0.008 -0.1404)
OKLCH	oklch(35.23% 0.141 266.8)
XYZ	xyz(5.6196, 4.0543, 21.9547)
Luminance	0.0406 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1A3183 #836C1A

analogous

#1A6583 #1A3183 #371A83

triadic

#1A3183 #831A31 #31831A

tetradic

#1A3183 #831A65 #836C1A #1A8337

square

#1A3183 #831A65 #836C1A #1A8337

split-complementary

#1A3183 #83371A #65831A

monochromatic

#060B1D #101E50 #1A3183 #2444B6 #3F60D9

Accessibility & contrast

On white

11.60

#1A3183 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.81

#1A3183 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1A3183

11.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1A3183	#FFFFFF	#000000	##FFFFFF
##1A3183	1.00	11.60	1.81	11.60
#FFFFFF	11.60	1.00	21.00	1.00
#000000	1.81	21.00	1.00	21.00
##FFFFFF	11.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003E86

Deuteranopia (green-blind)

#003481

Tritanopia (blue-blind)

#004655

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #1a3183;
/* rgb */ color: rgb(26, 49, 131);
/* oklch */ color: oklch(35.2% 0.141 266.8);

Tailwind

colors: {
  custom: {
    50: '#6968a8',
    500: '#1a3183',
    950: '#000000',
  },
}

SCSS

$custom: #1a3183;
$custom-light: #6968a8;
$custom-dark: #000000;

JSON

{
  "hex": "#1a3183",
  "rgb": {
    "r": 26,
    "g": 49,
    "b": 131
  },
  "hsl": {
    "h": 226.857,
    "s": 66.879,
    "l": 30.784
  },
  "oklch": {
    "l": 0.35228,
    "c": 0.14063,
    "h": 266.8
  },
  "luminance": 0.04055
}

Semantic roles & 50–950 ramp

primary

#1A3183

secondary

#B79D42

accent

#C43EEA

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070610

muted

#7A7A7F

Preview Lab

Preview with #1A3183

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

Preview Lab → · Contrast checker → · Palette generator →