#1D2F81#1D2F81

#1D2F81 is a dark, vivid blue. Relative luminance 0.039; OKLCH L 34.8% C 0.140 H 268.4°. Best body text is #FFFFFF at 11.83:1 contrast (WCAG AA passes).

Color values

HEX	#1D2F81
RGB	rgb(29, 47, 129)
HSL	hsl(229, 63%, 31%)
HSV	hsv(229, 78%, 51%)
CMYK	cmyk(77.5%, 63.6%, 0%, 49.4%)
CIE-LAB	lab(23.27, 23.96, -48.26)
CIE-LCH	lch(23.27, 53.88, 296.40°)
OKLab	oklab(34.78% -0.0038 -0.1395)
OKLCH	oklch(34.78% 0.14 268.4)
XYZ	xyz(5.4843, 3.8786, 21.2242)
Luminance	0.0388 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D2F81 #816F1D

analogous

#1D6181 #1D2F81 #3D1D81

triadic

#1D2F81 #811D2F #2F811D

tetradic

#1D2F81 #811D61 #816F1D #1D813D

square

#1D2F81 #811D61 #816F1D #1D813D

split-complementary

#1D2F81 #813D1D #61811D

monochromatic

#070B1D #121D4F #1D2F81 #2841B3 #445ED5

Accessibility & contrast

On white

11.83

#1D2F81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.78

#1D2F81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D2F81

11.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D2F81	#FFFFFF	#000000	##FFFFFF
##1D2F81	1.00	11.83	1.78	11.83
#FFFFFF	11.83	1.00	21.00	1.00
#000000	1.78	21.00	1.00	21.00
##FFFFFF	11.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C84

Deuteranopia (green-blind)

#00337F

Tritanopia (blue-blind)

#004453

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #1d2f81;
/* rgb */ color: rgb(29, 47, 129);
/* oklch */ color: oklch(34.8% 0.140 268.4);

Tailwind

colors: {
  custom: {
    50: '#6a67a6',
    500: '#1d2f81',
    950: '#000000',
  },
}

SCSS

$custom: #1d2f81;
$custom-light: #6a67a6;
$custom-dark: #000000;

JSON

{
  "hex": "#1d2f81",
  "rgb": {
    "r": 29,
    "g": 47,
    "b": 129
  },
  "hsl": {
    "h": 229.2,
    "s": 63.291,
    "l": 30.98
  },
  "oklch": {
    "l": 0.34777,
    "c": 0.13951,
    "h": 268.4
  },
  "luminance": 0.03879
}

Semantic roles & 50–950 ramp

primary

#1D2F81

secondary

#B4A046

accent

#C941E6

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #1D2F81

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

Preview Lab → · Contrast checker → · Palette generator →