#1D288E#1D288E

#1D288E is a dark, vivid blue. Relative luminance 0.037; OKLCH L 34.8% C 0.166 H 269.8°. Best body text is #FFFFFF at 12.02:1 contrast (WCAG AA passes).

Color values

HEX	#1D288E
RGB	rgb(29, 40, 142)
HSL	hsl(234, 66%, 34%)
HSV	hsv(234, 80%, 56%)
CMYK	cmyk(79.6%, 71.8%, 0%, 44.3%)
CIE-LAB	lab(22.76, 33.61, -57.22)
CIE-LCH	lch(22.76, 66.36, 300.43°)
OKLab	oklab(34.79% -0.0005 -0.1657)
OKLCH	oklch(34.79% 0.166 269.8)
XYZ	xyz(6.1463, 3.7311, 25.9822)
Luminance	0.0373 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D288E #8E831D

analogous

#1D608E #1D288E #4A1D8E

triadic

#1D288E #8E1D28 #288E1D

tetradic

#1D288E #8E1D60 #8E831D #1D8E4A

square

#1D288E #8E1D60 #8E831D #1D8E4A

split-complementary

#1D288E #8E4A1D #608E1D

monochromatic

#080B28 #131A5B #1D288E #2736C1 #4B59DA

Accessibility & contrast

On white

12.02

#1D288E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.75

#1D288E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D288E

12.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D288E	#FFFFFF	#000000	##FFFFFF
##1D288E	1.00	12.02	1.75	12.02
#FFFFFF	12.02	1.00	21.00	1.00
#000000	1.75	21.00	1.00	21.00
##FFFFFF	12.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C91

Deuteranopia (green-blind)

#00318C

Tritanopia (blue-blind)

#004558

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #1d288e;
/* rgb */ color: rgb(29, 40, 142);
/* oklch */ color: oklch(34.8% 0.166 269.8);

Tailwind

colors: {
  custom: {
    50: '#6e62b0',
    500: '#1d288e',
    950: '#000000',
  },
}

SCSS

$custom: #1d288e;
$custom-light: #6e62b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1d288e",
  "rgb": {
    "r": 29,
    "g": 40,
    "b": 142
  },
  "hsl": {
    "h": 234.159,
    "s": 66.082,
    "l": 33.529
  },
  "oklch": {
    "l": 0.34792,
    "c": 0.1657,
    "h": 269.8
  },
  "luminance": 0.03732
}

Semantic roles & 50–950 ramp

primary

#1D288E

secondary

#BDB14A

accent

#D83FE9

background

#F7F5FB

surface

#EDEAF6

border

#C8C6D0

text

#080511

muted

#7B7980

Preview Lab

Preview with #1D288E

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

Preview Lab → · Contrast checker → · Palette generator →