#1D2771#1D2771

#1D2771 is a dark, vivid blue. Relative luminance 0.029; OKLCH L 31.7% C 0.127 H 271.2°. Best body text is #FFFFFF at 13.28:1 contrast (WCAG AA passes).

Color values

HEX	#1D2771
RGB	rgb(29, 39, 113)
HSL	hsl(233, 59%, 28%)
HSV	hsv(233, 74%, 44%)
CMYK	cmyk(74.3%, 65.5%, 0%, 55.7%)
CIE-LAB	lab(19.66, 23.25, -43.97)
CIE-LCH	lch(19.66, 49.74, 297.86°)
OKLab	oklab(31.66% 0.0026 -0.127)
OKLCH	oklch(31.66% 0.127 271.2)
XYZ	xyz(4.2118, 2.9041, 15.9582)
Luminance	0.0290 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D2771 #71671D

analogous

#1D5171 #1D2771 #3D1D71

triadic

#1D2771 #711D27 #27711D

tetradic

#1D2771 #711D51 #71671D #1D713D

square

#1D2771 #711D51 #71671D #1D713D

split-complementary

#1D2771 #713D1D #51711D

monochromatic

#060818 #111640 #1D2771 #2938A2 #3C4DCD

Accessibility & contrast

On white

13.28

#1D2771 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.58

#1D2771 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D2771

13.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D2771	#FFFFFF	#000000	##FFFFFF
##1D2771	1.00	13.28	1.58	13.28
#FFFFFF	13.28	1.00	21.00	1.00
#000000	1.58	21.00	1.00	21.00
##FFFFFF	13.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003473

Deuteranopia (green-blind)

#002C70

Tritanopia (blue-blind)

#003A48

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #1d2771;
/* rgb */ color: rgb(29, 39, 113);
/* oklch */ color: oklch(31.7% 0.127 271.2);

Tailwind

colors: {
  custom: {
    50: '#66619b',
    500: '#1d2771',
    950: '#000000',
  },
}

SCSS

$custom: #1d2771;
$custom-light: #66619b;
$custom-dark: #000000;

JSON

{
  "hex": "#1d2771",
  "rgb": {
    "r": 29,
    "g": 39,
    "b": 113
  },
  "hsl": {
    "h": 232.857,
    "s": 59.155,
    "l": 27.843
  },
  "oklch": {
    "l": 0.3166,
    "c": 0.127,
    "h": 271.2
  },
  "luminance": 0.02905
}

Semantic roles & 50–950 ramp

primary

#1D2771

secondary

#A59A44

accent

#D045E2

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07050E

muted

#7A797E

Preview Lab

Preview with #1D2771

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

Preview Lab → · Contrast checker → · Palette generator →