#1D3C8F#1D3C8F

#1D3C8F is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.7% C 0.143 H 264.9°. Best body text is #FFFFFF at 10.02:1 contrast (WCAG AA passes).

Color values

HEX	#1D3C8F
RGB	rgb(29, 60, 143)
HSL	hsl(224, 66%, 34%)
HSV	hsv(224, 80%, 56%)
CMYK	cmyk(79.7%, 58%, 0%, 43.9%)
CIE-LAB	lab(28.05, 20.50, -49.18)
CIE-LCH	lch(28.05, 53.29, 292.63°)
OKLab	oklab(38.72% -0.0128 -0.142)
OKLCH	oklch(38.72% 0.143 264.9)
XYZ	xyz(7.0787, 5.4753, 26.6650)
Luminance	0.0548 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3C8F #8F701D

analogous

#1D758F #1D3C8F #371D8F

triadic

#1D3C8F #8F1D3C #3C8F1D

tetradic

#1D3C8F #8F1D75 #8F701D #1D8F37

square

#1D3C8F #8F1D75 #8F701D #1D8F37

split-complementary

#1D3C8F #8F371D #758F1D

monochromatic

#081129 #13275C #1D3C8F #2751C2 #4C73DB

Accessibility & contrast

On white

10.02

#1D3C8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.10

#1D3C8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3C8F

10.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3C8F	#FFFFFF	#000000	##FFFFFF
##1D3C8F	1.00	10.02	2.10	10.02
#FFFFFF	10.02	1.00	21.00	1.00
#000000	2.10	21.00	1.00	21.00
##FFFFFF	10.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004892

Deuteranopia (green-blind)

#003D8D

Tritanopia (blue-blind)

#00515F

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1d3c8f;
/* rgb */ color: rgb(29, 60, 143);
/* oklch */ color: oklch(38.7% 0.143 264.9);

Tailwind

colors: {
  custom: {
    50: '#6c71b0',
    500: '#1d3c8f',
    950: '#000000',
  },
}

SCSS

$custom: #1d3c8f;
$custom-light: #6c71b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3c8f",
  "rgb": {
    "r": 29,
    "g": 60,
    "b": 143
  },
  "hsl": {
    "h": 223.684,
    "s": 66.279,
    "l": 33.725
  },
  "oklch": {
    "l": 0.3872,
    "c": 0.14254,
    "h": 264.9
  },
  "luminance": 0.05476
}

Semantic roles & 50–950 ramp

primary

#1D3C8F

secondary

#BD9E4B

accent

#BB3FE9

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080711

muted

#7B7A80

Preview Lab

Preview with #1D3C8F

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

Preview Lab → · Contrast checker → · Palette generator →