#1B2879#1B2879

#1B2879 is a dark, vivid blue. Relative luminance 0.031; OKLCH L 32.5% C 0.138 H 269.7°. Best body text is #FFFFFF at 12.91:1 contrast (WCAG AA passes).

Color values

HEX	#1B2879
RGB	rgb(27, 40, 121)
HSL	hsl(232, 64%, 29%)
HSV	hsv(232, 78%, 47%)
CMYK	cmyk(77.7%, 66.9%, 0%, 52.5%)
CIE-LAB	lab(20.56, 25.43, -47.63)
CIE-LCH	lch(20.56, 53.99, 298.10°)
OKLab	oklab(32.53% -0.0007 -0.1377)
OKLCH	oklch(32.53% 0.138 269.7)
XYZ	xyz(4.6608, 3.1306, 18.4441)
Luminance	0.0313 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2879 #796C1B

analogous

#1B5779 #1B2879 #3D1B79

triadic

#1B2879 #791B28 #28791B

tetradic

#1B2879 #791B57 #796C1B #1B793D

square

#1B2879 #791B57 #796C1B #1B793D

split-complementary

#1B2879 #793D1B #57791B

monochromatic

#060819 #101747 #1B2879 #2639AB #3B50D3

Accessibility & contrast

On white

12.91

#1B2879 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.63

#1B2879 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2879

12.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2879	#FFFFFF	#000000	##FFFFFF
##1B2879	1.00	12.91	1.63	12.91
#FFFFFF	12.91	1.00	21.00	1.00
#000000	1.63	21.00	1.00	21.00
##FFFFFF	12.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00367C

Deuteranopia (green-blind)

#002D77

Tritanopia (blue-blind)

#003D4C

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #1b2879;
/* rgb */ color: rgb(27, 40, 121);
/* oklch */ color: oklch(32.5% 0.138 269.7);

Tailwind

colors: {
  custom: {
    50: '#6762a1',
    500: '#1b2879',
    950: '#000000',
  },
}

SCSS

$custom: #1b2879;
$custom-light: #6762a1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2879",
  "rgb": {
    "r": 27,
    "g": 40,
    "b": 121
  },
  "hsl": {
    "h": 231.702,
    "s": 63.514,
    "l": 29.02
  },
  "oklch": {
    "l": 0.32525,
    "c": 0.13772,
    "h": 269.7
  },
  "luminance": 0.03131
}

Semantic roles & 50–950 ramp

primary

#1B2879

secondary

#AD9E43

accent

#D041E7

background

#F6F5FA

surface

#EBEAF3

border

#C6C6CD

text

#07050F

muted

#7A797F

Preview Lab

Preview with #1B2879

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

Preview Lab → · Contrast checker → · Palette generator →