#1D3DA8#1D3DA8

#1D3DA8 is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.2% C 0.175 H 265.8°. Best body text is #FFFFFF at 9.19:1 contrast (WCAG AA passes).

Color values

HEX	#1D3DA8
RGB	rgb(29, 61, 168)
HSL	hsl(226, 71%, 39%)
HSV	hsv(226, 83%, 66%)
CMYK	cmyk(82.7%, 63.7%, 0%, 34.1%)
CIE-LAB	lab(30.46, 29.65, -60.45)
CIE-LCH	lch(30.46, 67.33, 296.13°)
OKLab	oklab(41.18% -0.0128 -0.175)
OKLCH	oklch(41.18% 0.175 265.8)
XYZ	xyz(9.2408, 6.4247, 37.7913)
Luminance	0.0643 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3DA8 #A8881D

analogous

#1D82A8 #1D3DA8 #421DA8

triadic

#1D3DA8 #A81D3D #3DA81D

tetradic

#1D3DA8 #A81D82 #A8881D #1DA842

square

#1D3DA8 #A81D82 #A8881D #1DA842

split-complementary

#1D3DA8 #A8421D #82A81D

monochromatic

#0B1740 #142A74 #1D3DA8 #2851DA #5C7BE3

Accessibility & contrast

On white

9.19

#1D3DA8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.29

#1D3DA8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3DA8

9.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3DA8	#FFFFFF	#000000	##FFFFFF
##1D3DA8	1.00	9.19	2.29	9.19
#FFFFFF	9.19	1.00	21.00	1.00
#000000	2.29	21.00	1.00	21.00
##FFFFFF	9.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EAB

Deuteranopia (green-blind)

#0041A6

Tritanopia (blue-blind)

#00596C

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #1d3da8;
/* rgb */ color: rgb(29, 61, 168);
/* oklch */ color: oklch(41.2% 0.175 265.8);

Tailwind

colors: {
  custom: {
    50: '#7372c3',
    500: '#1d3da8',
    950: '#000000',
  },
}

SCSS

$custom: #1d3da8;
$custom-light: #7372c3;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3da8",
  "rgb": {
    "r": 29,
    "g": 61,
    "b": 168
  },
  "hsl": {
    "h": 226.187,
    "s": 70.558,
    "l": 38.627
  },
  "oklch": {
    "l": 0.41184,
    "c": 0.17547,
    "h": 265.8
  },
  "luminance": 0.06426
}

Semantic roles & 50–950 ramp

primary

#1D3DA8

secondary

#C7AE5A

accent

#C43AED

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #1D3DA8

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

Preview Lab → · Contrast checker → · Palette generator →