#1D3E71#1D3E71

#1D3E71 is a dark, moderate blue. Relative luminance 0.049; OKLCH L 36.8% C 0.096 H 258.9°. Best body text is #FFFFFF at 10.61:1 contrast (WCAG AA passes).

Color values

HEX	#1D3E71
RGB	rgb(29, 62, 113)
HSL	hsl(216, 59%, 28%)
HSV	hsv(216, 74%, 44%)
CMYK	cmyk(74.3%, 45.1%, 0%, 55.7%)
CIE-LAB	lab(26.44, 6.98, -33.00)
CIE-LCH	lch(26.44, 33.73, 281.94°)
OKLab	oklab(36.8% -0.0185 -0.0943)
OKLCH	oklch(36.8% 0.096 258.9)
XYZ	xyz(5.2089, 4.8982, 16.2905)
Luminance	0.0490 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3E71 #71501D

analogous

#1D6871 #1D3E71 #261D71

triadic

#1D3E71 #711D3E #3E711D

tetradic

#1D3E71 #711D68 #71501D #1D7126

square

#1D3E71 #711D68 #71501D #1D7126

split-complementary

#1D3E71 #71261D #68711D

monochromatic

#060D18 #112340 #1D3E71 #2959A2 #3C75CD

Accessibility & contrast

On white

10.61

#1D3E71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#1D3E71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3E71

10.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3E71	#FFFFFF	#000000	##FFFFFF
##1D3E71	1.00	10.61	1.98	10.61
#FFFFFF	10.61	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#254373

Deuteranopia (green-blind)

#173B70

Tritanopia (blue-blind)

#004A52

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #1d3e71;
/* rgb */ color: rgb(29, 62, 113);
/* oklch */ color: oklch(36.8% 0.096 258.9);

Tailwind

colors: {
  custom: {
    50: '#65729a',
    500: '#1d3e71',
    950: '#000000',
  },
}

SCSS

$custom: #1d3e71;
$custom-light: #65729a;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3e71",
  "rgb": {
    "r": 29,
    "g": 62,
    "b": 113
  },
  "hsl": {
    "h": 216.429,
    "s": 59.155,
    "l": 27.843
  },
  "oklch": {
    "l": 0.36796,
    "c": 0.09613,
    "h": 258.9
  },
  "luminance": 0.04899
}

Semantic roles & 50–950 ramp

primary

#1D3E71

secondary

#A57F44

accent

#A545E2

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06080E

muted

#7A7B7E

Preview Lab

Preview with #1D3E71

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

Preview Lab → · Contrast checker → · Palette generator →