#1D288D#1D288D

#1D288D is a dark, vivid blue. Relative luminance 0.037; OKLCH L 34.7% C 0.164 H 269.9°. Best body text is #FFFFFF at 12.07:1 contrast (WCAG AA passes).

Color values

HEX	#1D288D
RGB	rgb(29, 40, 141)
HSL	hsl(234, 66%, 33%)
HSV	hsv(234, 79%, 55%)
CMYK	cmyk(79.4%, 71.6%, 0%, 44.7%)
CIE-LAB	lab(22.66, 33.25, -56.77)
CIE-LCH	lch(22.66, 65.79, 300.35°)
OKLab	oklab(34.69% -0.0004 -0.1644)
OKLCH	oklch(34.69% 0.164 269.9)
XYZ	xyz(6.0716, 3.7012, 25.5886)
Luminance	0.0370 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D288D #8D821D

analogous

#1D608D #1D288D #4A1D8D

triadic

#1D288D #8D1D28 #288D1D

tetradic

#1D288D #8D1D60 #8D821D #1D8D4A

square

#1D288D #8D1D60 #8D821D #1D8D4A

split-complementary

#1D288D #8D4A1D #608D1D

monochromatic

#080B27 #131A5A #1D288D #2736C0 #4B59DA

Accessibility & contrast

On white

12.07

#1D288D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.74

#1D288D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D288D

12.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D288D	#FFFFFF	#000000	##FFFFFF
##1D288D	1.00	12.07	1.74	12.07
#FFFFFF	12.07	1.00	21.00	1.00
#000000	1.74	21.00	1.00	21.00
##FFFFFF	12.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C90

Deuteranopia (green-blind)

#00318B

Tritanopia (blue-blind)

#004457

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #1d288d;
/* rgb */ color: rgb(29, 40, 141);
/* oklch */ color: oklch(34.7% 0.164 269.9);

Tailwind

colors: {
  custom: {
    50: '#6d62af',
    500: '#1d288d',
    950: '#000000',
  },
}

SCSS

$custom: #1d288d;
$custom-light: #6d62af;
$custom-dark: #000000;

JSON

{
  "hex": "#1d288d",
  "rgb": {
    "r": 29,
    "g": 40,
    "b": 141
  },
  "hsl": {
    "h": 234.107,
    "s": 65.882,
    "l": 33.333
  },
  "oklch": {
    "l": 0.34686,
    "c": 0.16438,
    "h": 269.9
  },
  "luminance": 0.03702
}

Semantic roles & 50–950 ramp

primary

#1D288D

secondary

#BCB14A

accent

#D83FE9

background

#F7F5FA

surface

#EDEAF5

border

#C8C6CF

text

#080511

muted

#7B7980

Preview Lab

Preview with #1D288D

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

Preview Lab → · Contrast checker → · Palette generator →