#1D3CA8#1D3CA8

#1D3CA8 is a dark, vivid blue. Relative luminance 0.063; OKLCH L 41.0% C 0.177 H 266.0°. Best body text is #FFFFFF at 9.28:1 contrast (WCAG AA passes).

Color values

HEX	#1D3CA8
RGB	rgb(29, 60, 168)
HSL	hsl(227, 71%, 39%)
HSV	hsv(227, 83%, 66%)
CMYK	cmyk(82.7%, 64.3%, 0%, 34.1%)
CIE-LAB	lab(30.20, 30.32, -60.87)
CIE-LCH	lch(30.20, 68.00, 296.48°)
OKLab	oklab(40.99% -0.0123 -0.1762)
OKLCH	oklch(40.99% 0.177 266)
XYZ	xyz(9.1880, 6.3190, 37.7736)
Luminance	0.0632 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3CA8 #A8891D

analogous

#1D81A8 #1D3CA8 #441DA8

triadic

#1D3CA8 #A81D3C #3CA81D

tetradic

#1D3CA8 #A81D81 #A8891D #1DA844

square

#1D3CA8 #A81D81 #A8891D #1DA844

split-complementary

#1D3CA8 #A8441D #81A81D

monochromatic

#0B1740 #142974 #1D3CA8 #2850DA #5C7AE3

Accessibility & contrast

On white

9.28

#1D3CA8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.26

#1D3CA8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3CA8

9.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3CA8	#FFFFFF	#000000	##FFFFFF
##1D3CA8	1.00	9.28	2.26	9.28
#FFFFFF	9.28	1.00	21.00	1.00
#000000	2.26	21.00	1.00	21.00
##FFFFFF	9.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EAB

Deuteranopia (green-blind)

#0041A6

Tritanopia (blue-blind)

#00596C

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1d3ca8;
/* rgb */ color: rgb(29, 60, 168);
/* oklch */ color: oklch(41.0% 0.177 266.0);

Tailwind

colors: {
  custom: {
    50: '#7371c3',
    500: '#1d3ca8',
    950: '#000000',
  },
}

SCSS

$custom: #1d3ca8;
$custom-light: #7371c3;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3ca8",
  "rgb": {
    "r": 29,
    "g": 60,
    "b": 168
  },
  "hsl": {
    "h": 226.619,
    "s": 70.558,
    "l": 38.627
  },
  "oklch": {
    "l": 0.40994,
    "c": 0.17667,
    "h": 266
  },
  "luminance": 0.0632
}

Semantic roles & 50–950 ramp

primary

#1D3CA8

secondary

#C7AF5A

accent

#C53AED

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0713

muted

#7C7A82

Preview Lab

Preview with #1D3CA8

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

Preview Lab → · Contrast checker → · Palette generator →