#1D2571#1D2571

#1D2571 is a dark, vivid blue. Relative luminance 0.028; OKLCH L 31.3% C 0.130 H 271.8°. Best body text is #FFFFFF at 13.50:1 contrast (WCAG AA passes).

Color values

HEX	#1D2571
RGB	rgb(29, 37, 113)
HSL	hsl(234, 59%, 28%)
HSV	hsv(234, 74%, 44%)
CMYK	cmyk(74.3%, 67.3%, 0%, 55.7%)
CIE-LAB	lab(19.12, 24.64, -44.84)
CIE-LCH	lch(19.12, 51.16, 298.79°)
OKLab	oklab(31.27% 0.0041 -0.1295)
OKLCH	oklch(31.27% 0.13 271.8)
XYZ	xyz(4.1479, 2.7762, 15.9368)
Luminance	0.0278 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D2571 #71691D

analogous

#1D4F71 #1D2571 #3F1D71

triadic

#1D2571 #711D25 #25711D

tetradic

#1D2571 #711D4F #71691D #1D713F

square

#1D2571 #711D4F #71691D #1D713F

split-complementary

#1D2571 #713F1D #4F711D

monochromatic

#060818 #111540 #1D2571 #2935A2 #3C49CD

Accessibility & contrast

On white

13.50

#1D2571 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.56

#1D2571 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D2571

13.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D2571	#FFFFFF	#000000	##FFFFFF
##1D2571	1.00	13.50	1.56	13.50
#FFFFFF	13.50	1.00	21.00	1.00
#000000	1.56	21.00	1.00	21.00
##FFFFFF	13.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003273

Deuteranopia (green-blind)

#002B70

Tritanopia (blue-blind)

#003947

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1d2571;
/* rgb */ color: rgb(29, 37, 113);
/* oklch */ color: oklch(31.3% 0.130 271.8);

Tailwind

colors: {
  custom: {
    50: '#665f9b',
    500: '#1d2571',
    950: '#000000',
  },
}

SCSS

$custom: #1d2571;
$custom-light: #665f9b;
$custom-dark: #000000;

JSON

{
  "hex": "#1d2571",
  "rgb": {
    "r": 29,
    "g": 37,
    "b": 113
  },
  "hsl": {
    "h": 234.286,
    "s": 59.155,
    "l": 27.843
  },
  "oklch": {
    "l": 0.31269,
    "c": 0.12959,
    "h": 271.8
  },
  "luminance": 0.02777
}

Semantic roles & 50–950 ramp

primary

#1D2571

secondary

#A59C44

accent

#D345E2

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07040E

muted

#7A797E

Preview Lab

Preview with #1D2571

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

Preview Lab → · Contrast checker → · Palette generator →