#1D2579#1D2579

#1D2579 is a dark, vivid blue. Relative luminance 0.030; OKLCH L 32.1% C 0.141 H 271.4°. Best body text is #FFFFFF at 13.18:1 contrast (WCAG AA passes).

Color values

HEX	#1D2579
RGB	rgb(29, 37, 121)
HSL	hsl(235, 61%, 29%)
HSV	hsv(235, 76%, 47%)
CMYK	cmyk(76%, 69.4%, 0%, 52.5%)
CIE-LAB	lab(19.90, 27.71, -48.70)
CIE-LCH	lch(19.90, 56.04, 299.64°)
OKLab	oklab(32.07% 0.0035 -0.1408)
OKLCH	oklch(32.07% 0.141 271.4)
XYZ	xyz(4.6183, 2.9643, 18.4142)
Luminance	0.0296 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D2579 #79711D

analogous

#1D5379 #1D2579 #431D79

triadic

#1D2579 #791D25 #25791D

tetradic

#1D2579 #791D53 #79711D #1D7943

square

#1D2579 #791D53 #79711D #1D7943

split-complementary

#1D2579 #79431D #53791D

monochromatic

#060819 #111648 #1D2579 #2934AA #3F4CD1

Accessibility & contrast

On white

13.18

#1D2579 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.59

#1D2579 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D2579

13.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D2579	#FFFFFF	#000000	##FFFFFF
##1D2579	1.00	13.18	1.59	13.18
#FFFFFF	13.18	1.00	21.00	1.00
#000000	1.59	21.00	1.00	21.00
##FFFFFF	13.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00347C

Deuteranopia (green-blind)

#002C77

Tritanopia (blue-blind)

#003C4B

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #1d2579;
/* rgb */ color: rgb(29, 37, 121);
/* oklch */ color: oklch(32.1% 0.141 271.4);

Tailwind

colors: {
  custom: {
    50: '#685fa1',
    500: '#1d2579',
    950: '#000000',
  },
}

SCSS

$custom: #1d2579;
$custom-light: #685fa1;
$custom-dark: #000000;

JSON

{
  "hex": "#1d2579",
  "rgb": {
    "r": 29,
    "g": 37,
    "b": 121
  },
  "hsl": {
    "h": 234.783,
    "s": 61.333,
    "l": 29.412
  },
  "oklch": {
    "l": 0.32074,
    "c": 0.14088,
    "h": 271.4
  },
  "luminance": 0.02965
}

Semantic roles & 50–950 ramp

primary

#1D2579

secondary

#ADA445

accent

#D643E4

background

#F6F5FA

surface

#ECE9F3

border

#C7C5CD

text

#07040F

muted

#7A797F

Preview Lab

Preview with #1D2579

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

Preview Lab → · Contrast checker → · Palette generator →