#1D3F71#1D3F71

#1D3F71 is a dark, moderate blue. Relative luminance 0.050; OKLCH L 37.0% C 0.095 H 258.1°. Best body text is #FFFFFF at 10.49:1 contrast (WCAG AA passes).

Color values

HEX	#1D3F71
RGB	rgb(29, 63, 113)
HSL	hsl(216, 59%, 28%)
HSV	hsv(216, 74%, 44%)
CMYK	cmyk(74.3%, 44.2%, 0%, 55.7%)
CIE-LAB	lab(26.76, 6.29, -32.50)
CIE-LCH	lch(26.76, 33.10, 280.95°)
OKLab	oklab(37.04% -0.0195 -0.0928)
OKLCH	oklch(37.04% 0.095 258.1)
XYZ	xyz(5.2638, 5.0079, 16.3088)
Luminance	0.0501 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3F71 #714F1D

analogous

#1D6971 #1D3F71 #251D71

triadic

#1D3F71 #711D3F #3F711D

tetradic

#1D3F71 #711D69 #714F1D #1D7125

square

#1D3F71 #711D69 #714F1D #1D7125

split-complementary

#1D3F71 #71251D #69711D

monochromatic

#060E18 #112440 #1D3F71 #295AA2 #3C76CD

Accessibility & contrast

On white

10.49

#1D3F71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.00

#1D3F71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3F71

10.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3F71	#FFFFFF	#000000	##FFFFFF
##1D3F71	1.00	10.49	2.00	10.49
#FFFFFF	10.49	1.00	21.00	1.00
#000000	2.00	21.00	1.00	21.00
##FFFFFF	10.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#274373

Deuteranopia (green-blind)

#193C70

Tritanopia (blue-blind)

#004B52

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #1d3f71;
/* rgb */ color: rgb(29, 63, 113);
/* oklch */ color: oklch(37.0% 0.095 258.1);

Tailwind

colors: {
  custom: {
    50: '#65739a',
    500: '#1d3f71',
    950: '#000000',
  },
}

SCSS

$custom: #1d3f71;
$custom-light: #65739a;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3f71",
  "rgb": {
    "r": 29,
    "g": 63,
    "b": 113
  },
  "hsl": {
    "h": 215.714,
    "s": 59.155,
    "l": 27.843
  },
  "oklch": {
    "l": 0.37039,
    "c": 0.09486,
    "h": 258.1
  },
  "luminance": 0.05008
}

Semantic roles & 50–950 ramp

primary

#1D3F71

secondary

#A57E44

accent

#A345E2

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06080E

muted

#7A7B7E

Preview Lab

Preview with #1D3F71

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

Preview Lab → · Contrast checker → · Palette generator →