#1D3F8E#1D3F8E

#1D3F8E is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.3% C 0.137 H 263.7°. Best body text is #FFFFFF at 9.75:1 contrast (WCAG AA passes).

Color values

HEX	#1D3F8E
RGB	rgb(29, 63, 142)
HSL	hsl(222, 66%, 34%)
HSV	hsv(222, 80%, 56%)
CMYK	cmyk(79.6%, 55.6%, 0%, 44.3%)
CIE-LAB	lab(28.82, 18.02, -47.31)
CIE-LCH	lch(28.82, 50.63, 290.86°)
OKLab	oklab(39.28% -0.0151 -0.1364)
OKLCH	oklch(39.28% 0.137 263.7)
XYZ	xyz(7.1649, 5.7684, 26.3217)
Luminance	0.0577 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3F8E #8E6C1D

analogous

#1D778E #1D3F8E #331D8E

triadic

#1D3F8E #8E1D3F #3F8E1D

tetradic

#1D3F8E #8E1D77 #8E6C1D #1D8E33

square

#1D3F8E #8E1D77 #8E6C1D #1D8E33

split-complementary

#1D3F8E #8E331D #778E1D

monochromatic

#081228 #13285B #1D3F8E #2756C1 #4B76DA

Accessibility & contrast

On white

9.75

#1D3F8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.15

#1D3F8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3F8E

9.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3F8E	#FFFFFF	#000000	##FFFFFF
##1D3F8E	1.00	9.75	2.15	9.75
#FFFFFF	9.75	1.00	21.00	1.00
#000000	2.15	21.00	1.00	21.00
##FFFFFF	9.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004991

Deuteranopia (green-blind)

#003F8C

Tritanopia (blue-blind)

#005260

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #1d3f8e;
/* rgb */ color: rgb(29, 63, 142);
/* oklch */ color: oklch(39.3% 0.137 263.7);

Tailwind

colors: {
  custom: {
    50: '#6c73b0',
    500: '#1d3f8e',
    950: '#000000',
  },
}

SCSS

$custom: #1d3f8e;
$custom-light: #6c73b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3f8e",
  "rgb": {
    "r": 29,
    "g": 63,
    "b": 142
  },
  "hsl": {
    "h": 221.947,
    "s": 66.082,
    "l": 33.529
  },
  "oklch": {
    "l": 0.39278,
    "c": 0.13725,
    "h": 263.7
  },
  "luminance": 0.05769
}

Semantic roles & 50–950 ramp

primary

#1D3F8E

secondary

#BD9A4A

accent

#B63FE9

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080810

muted

#7B7B7F

Preview Lab

Preview with #1D3F8E

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

Preview Lab → · Contrast checker → · Palette generator →