#1D3E8F#1D3E8F

#1D3E8F is a dark, vivid blue. Relative luminance 0.057; OKLCH L 39.1% C 0.140 H 264.2°. Best body text is #FFFFFF at 9.82:1 contrast (WCAG AA passes).

Color values

HEX	#1D3E8F
RGB	rgb(29, 62, 143)
HSL	hsl(223, 66%, 34%)
HSV	hsv(223, 80%, 56%)
CMYK	cmyk(79.7%, 56.6%, 0%, 43.9%)
CIE-LAB	lab(28.61, 19.12, -48.26)
CIE-LCH	lch(28.61, 51.91, 291.61°)
OKLab	oklab(39.15% -0.0142 -0.1392)
OKLCH	oklch(39.15% 0.14 264.2)
XYZ	xyz(7.1855, 5.6888, 26.7006)
Luminance	0.0569 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3E8F #8F6E1D

analogous

#1D778F #1D3E8F #351D8F

triadic

#1D3E8F #8F1D3E #3E8F1D

tetradic

#1D3E8F #8F1D77 #8F6E1D #1D8F35

square

#1D3E8F #8F1D77 #8F6E1D #1D8F35

split-complementary

#1D3E8F #8F351D #778F1D

monochromatic

#081229 #13285C #1D3E8F #2754C2 #4C75DB

Accessibility & contrast

On white

9.82

#1D3E8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.14

#1D3E8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3E8F

9.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3E8F	#FFFFFF	#000000	##FFFFFF
##1D3E8F	1.00	9.82	2.14	9.82
#FFFFFF	9.82	1.00	21.00	1.00
#000000	2.14	21.00	1.00	21.00
##FFFFFF	9.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004992

Deuteranopia (green-blind)

#003E8D

Tritanopia (blue-blind)

#005260

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1d3e8f;
/* rgb */ color: rgb(29, 62, 143);
/* oklch */ color: oklch(39.1% 0.140 264.2);

Tailwind

colors: {
  custom: {
    50: '#6c72b0',
    500: '#1d3e8f',
    950: '#000000',
  },
}

SCSS

$custom: #1d3e8f;
$custom-light: #6c72b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3e8f",
  "rgb": {
    "r": 29,
    "g": 62,
    "b": 143
  },
  "hsl": {
    "h": 222.632,
    "s": 66.279,
    "l": 33.725
  },
  "oklch": {
    "l": 0.39146,
    "c": 0.13997,
    "h": 264.2
  },
  "luminance": 0.0569
}

Semantic roles & 50–950 ramp

primary

#1D3E8F

secondary

#BD9C4B

accent

#B83FE9

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080811

muted

#7B7B80

Preview Lab

Preview with #1D3E8F

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

Preview Lab → · Contrast checker → · Palette generator →