#1D3777#1D3777

#1D3777 is a dark, moderate blue. Relative luminance 0.043; OKLCH L 35.6% C 0.114 H 264.6°. Best body text is #FFFFFF at 11.26:1 contrast (WCAG AA passes).

Color values

HEX	#1D3777
RGB	rgb(29, 55, 119)
HSL	hsl(223, 61%, 29%)
HSV	hsv(223, 76%, 47%)
CMYK	cmyk(75.6%, 53.8%, 0%, 53.3%)
CIE-LAB	lab(24.72, 14.32, -39.58)
CIE-LCH	lch(24.72, 42.09, 289.89°)
OKLab	oklab(35.61% -0.0108 -0.1138)
OKLCH	oklch(35.61% 0.114 264.6)
XYZ	xyz(5.2015, 4.3249, 18.0099)
Luminance	0.0432 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3777 #775D1D

analogous

#1D6477 #1D3777 #301D77

triadic

#1D3777 #771D37 #37771D

tetradic

#1D3777 #771D64 #775D1D #1D7730

square

#1D3777 #771D64 #775D1D #1D7730

split-complementary

#1D3777 #77301D #64771D

monochromatic

#060B19 #112046 #1D3777 #294EA8 #3E68D0

Accessibility & contrast

On white

11.26

#1D3777 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.87

#1D3777 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3777

11.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3777	#FFFFFF	#000000	##FFFFFF
##1D3777	1.00	11.26	1.87	11.26
#FFFFFF	11.26	1.00	21.00	1.00
#000000	1.87	21.00	1.00	21.00
##FFFFFF	11.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0E3F79

Deuteranopia (green-blind)

#003776

Tritanopia (blue-blind)

#004651

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1d3777;
/* rgb */ color: rgb(29, 55, 119);
/* oklch */ color: oklch(35.6% 0.114 264.6);

Tailwind

colors: {
  custom: {
    50: '#666d9f',
    500: '#1d3777',
    950: '#000000',
  },
}

SCSS

$custom: #1d3777;
$custom-light: #666d9f;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3777",
  "rgb": {
    "r": 29,
    "g": 55,
    "b": 119
  },
  "hsl": {
    "h": 222.667,
    "s": 60.811,
    "l": 29.02
  },
  "oklch": {
    "l": 0.35608,
    "c": 0.11434,
    "h": 264.6
  },
  "luminance": 0.04325
}

Semantic roles & 50–950 ramp

primary

#1D3777

secondary

#AB8D45

accent

#B644E4

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#07070E

muted

#7A7A7E

Preview Lab

Preview with #1D3777

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

Preview Lab → · Contrast checker → · Palette generator →