#1D3D71#1D3D71

#1D3D71 is a dark, moderate blue. Relative luminance 0.048; OKLCH L 36.6% C 0.097 H 259.7°. Best body text is #FFFFFF at 10.72:1 contrast (WCAG AA passes).

Color values

HEX	#1D3D71
RGB	rgb(29, 61, 113)
HSL	hsl(217, 59%, 28%)
HSV	hsv(217, 74%, 44%)
CMYK	cmyk(74.3%, 46%, 0%, 55.7%)
CIE-LAB	lab(26.13, 7.67, -33.50)
CIE-LCH	lch(26.13, 34.37, 282.90°)
OKLab	oklab(36.55% -0.0175 -0.0958)
OKLCH	oklch(36.55% 0.097 259.7)
XYZ	xyz(5.1550, 4.7904, 16.2725)
Luminance	0.0479 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3D71 #71511D

analogous

#1D6771 #1D3D71 #271D71

triadic

#1D3D71 #711D3D #3D711D

tetradic

#1D3D71 #711D67 #71511D #1D7127

square

#1D3D71 #711D67 #71511D #1D7127

split-complementary

#1D3D71 #71271D #67711D

monochromatic

#060D18 #112340 #1D3D71 #2957A2 #3C73CD

Accessibility & contrast

On white

10.72

#1D3D71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#1D3D71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3D71

10.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3D71	#FFFFFF	#000000	##FFFFFF
##1D3D71	1.00	10.72	1.96	10.72
#FFFFFF	10.72	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#234273

Deuteranopia (green-blind)

#143A70

Tritanopia (blue-blind)

#004951

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1d3d71;
/* rgb */ color: rgb(29, 61, 113);
/* oklch */ color: oklch(36.6% 0.097 259.7);

Tailwind

colors: {
  custom: {
    50: '#65729a',
    500: '#1d3d71',
    950: '#000000',
  },
}

SCSS

$custom: #1d3d71;
$custom-light: #65729a;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3d71",
  "rgb": {
    "r": 29,
    "g": 61,
    "b": 113
  },
  "hsl": {
    "h": 217.143,
    "s": 59.155,
    "l": 27.843
  },
  "oklch": {
    "l": 0.36553,
    "c": 0.0974,
    "h": 259.7
  },
  "luminance": 0.04791
}

Semantic roles & 50–950 ramp

primary

#1D3D71

secondary

#A58044

accent

#A745E2

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #1D3D71

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

Preview Lab → · Contrast checker → · Palette generator →