#1A3583#1A3583

#1A3583 is a dark, vivid blue. Relative luminance 0.044; OKLCH L 36.1% C 0.135 H 265.4°. Best body text is #FFFFFF at 11.16:1 contrast (WCAG AA passes).

Color values

HEX	#1A3583
RGB	rgb(26, 53, 131)
HSL	hsl(225, 67%, 31%)
HSV	hsv(225, 80%, 51%)
CMYK	cmyk(80.2%, 59.5%, 0%, 48.6%)
CIE-LAB	lab(24.96, 20.22, -46.76)
CIE-LCH	lch(24.96, 50.94, 293.38°)
OKLab	oklab(36.06% -0.0108 -0.135)
OKLCH	oklch(36.06% 0.135 265.4)
XYZ	xyz(5.7944, 4.4038, 22.0130)
Luminance	0.0440 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1A3583 #83681A

analogous

#1A6983 #1A3583 #331A83

triadic

#1A3583 #831A35 #35831A

tetradic

#1A3583 #831A69 #83681A #1A8333

square

#1A3583 #831A69 #83681A #1A8333

split-complementary

#1A3583 #83331A #69831A

monochromatic

#060C1D #102050 #1A3583 #244AB6 #3F66D9

Accessibility & contrast

On white

11.16

#1A3583 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#1A3583 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1A3583

11.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1A3583	#FFFFFF	#000000	##FFFFFF
##1A3583	1.00	11.16	1.88	11.16
#FFFFFF	11.16	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004086

Deuteranopia (green-blind)

#003781

Tritanopia (blue-blind)

#004956

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1a3583;
/* rgb */ color: rgb(26, 53, 131);
/* oklch */ color: oklch(36.1% 0.135 265.4);

Tailwind

colors: {
  custom: {
    50: '#696ba8',
    500: '#1a3583',
    950: '#000000',
  },
}

SCSS

$custom: #1a3583;
$custom-light: #696ba8;
$custom-dark: #000000;

JSON

{
  "hex": "#1a3583",
  "rgb": {
    "r": 26,
    "g": 53,
    "b": 131
  },
  "hsl": {
    "h": 224.571,
    "s": 66.879,
    "l": 30.784
  },
  "oklch": {
    "l": 0.3606,
    "c": 0.13544,
    "h": 265.4
  },
  "luminance": 0.04405
}

Semantic roles & 50–950 ramp

primary

#1A3583

secondary

#B79942

accent

#BE3EEA

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070610

muted

#7A7A7F

Preview Lab

Preview with #1A3583

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

Preview Lab → · Contrast checker → · Palette generator →