#1D237A#1D237A

#1D237A is a dark, vivid blue. Relative luminance 0.029; OKLCH L 31.8% C 0.145 H 271.8°. Best body text is #FFFFFF at 13.35:1 contrast (WCAG AA passes).

Color values

HEX	#1D237A
RGB	rgb(29, 35, 122)
HSL	hsl(236, 62%, 30%)
HSV	hsv(236, 76%, 48%)
CMYK	cmyk(76.2%, 71.3%, 0%, 52.2%)
CIE-LAB	lab(19.51, 29.42, -49.99)
CIE-LCH	lch(19.51, 58.00, 300.48°)
OKLab	oklab(31.82% 0.0046 -0.1446)
OKLCH	oklch(31.82% 0.145 271.8)
XYZ	xyz(4.6194, 2.8679, 18.7187)
Luminance	0.0287 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D237A #7A741D

analogous

#1D527A #1D237A #461D7A

triadic

#1D237A #7A1D23 #237A1D

tetradic

#1D237A #7A1D52 #7A741D #1D7A46

square

#1D237A #7A1D52 #7A741D #1D7A46

split-complementary

#1D237A #7A461D #527A1D

monochromatic

#060719 #111549 #1D237A #2931AB #4049D2

Accessibility & contrast

On white

13.35

#1D237A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#1D237A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D237A

13.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D237A	#FFFFFF	#000000	##FFFFFF
##1D237A	1.00	13.35	1.57	13.35
#FFFFFF	13.35	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00347D

Deuteranopia (green-blind)

#002B78

Tritanopia (blue-blind)

#003B4B

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1d237a;
/* rgb */ color: rgb(29, 35, 122);
/* oklch */ color: oklch(31.8% 0.145 271.8);

Tailwind

colors: {
  custom: {
    50: '#695ea1',
    500: '#1d237a',
    950: '#000000',
  },
}

SCSS

$custom: #1d237a;
$custom-light: #695ea1;
$custom-dark: #000000;

JSON

{
  "hex": "#1d237a",
  "rgb": {
    "r": 29,
    "g": 35,
    "b": 122
  },
  "hsl": {
    "h": 236.129,
    "s": 61.589,
    "l": 29.608
  },
  "oklch": {
    "l": 0.31819,
    "c": 0.14467,
    "h": 271.8
  },
  "luminance": 0.02868
}

Semantic roles & 50–950 ramp

primary

#1D237A

secondary

#AEA745

accent

#DA43E5

background

#F6F5FA

surface

#ECE9F3

border

#C7C5CD

text

#07040F

muted

#7A797F

Preview Lab

Preview with #1D237A

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

Preview Lab → · Contrast checker → · Palette generator →