#1D288A#1D288A

#1D288A is a dark, vivid blue. Relative luminance 0.036; OKLCH L 34.4% C 0.160 H 270.0°. Best body text is #FFFFFF at 12.19:1 contrast (WCAG AA passes).

Color values

HEX	#1D288A
RGB	rgb(29, 40, 138)
HSL	hsl(234, 65%, 33%)
HSV	hsv(234, 79%, 54%)
CMYK	cmyk(79%, 71%, 0%, 45.9%)
CIE-LAB	lab(22.35, 32.13, -55.41)
CIE-LCH	lch(22.35, 64.05, 300.11°)
OKLab	oklab(34.37% -0.0001 -0.1604)
OKLCH	oklch(34.37% 0.16 270)
XYZ	xyz(5.8514, 3.6131, 24.4288)
Luminance	0.0361 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D288A #8A7F1D

analogous

#1D5E8A #1D288A #481D8A

triadic

#1D288A #8A1D28 #288A1D

tetradic

#1D288A #8A1D5E #8A7F1D #1D8A48

square

#1D288A #8A1D5E #8A7F1D #1D8A48

split-complementary

#1D288A #8A481D #5E8A1D

monochromatic

#080B25 #121957 #1D288A #2837BD #4957D9

Accessibility & contrast

On white

12.19

#1D288A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.72

#1D288A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D288A

12.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D288A	#FFFFFF	#000000	##FFFFFF
##1D288A	1.00	12.19	1.72	12.19
#FFFFFF	12.19	1.00	21.00	1.00
#000000	1.72	21.00	1.00	21.00
##FFFFFF	12.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003B8D

Deuteranopia (green-blind)

#003088

Tritanopia (blue-blind)

#004356

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #1d288a;
/* rgb */ color: rgb(29, 40, 138);
/* oklch */ color: oklch(34.4% 0.160 270.0);

Tailwind

colors: {
  custom: {
    50: '#6d62ad',
    500: '#1d288a',
    950: '#000000',
  },
}

SCSS

$custom: #1d288a;
$custom-light: #6d62ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1d288a",
  "rgb": {
    "r": 29,
    "g": 40,
    "b": 138
  },
  "hsl": {
    "h": 233.945,
    "s": 65.269,
    "l": 32.745
  },
  "oklch": {
    "l": 0.3437,
    "c": 0.16042,
    "h": 270
  },
  "luminance": 0.03614
}

Semantic roles & 50–950 ramp

primary

#1D288A

secondary

#BBAF48

accent

#D740E8

background

#F7F5FA

surface

#EDEAF4

border

#C8C6CE

text

#080510

muted

#7B797F

Preview Lab

Preview with #1D288A

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

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