#1B2979#1B2979

#1B2979 is a dark, vivid blue. Relative luminance 0.032; OKLCH L 32.7% C 0.136 H 269.4°. Best body text is #FFFFFF at 12.81:1 contrast (WCAG AA passes).

Color values

HEX	#1B2979
RGB	rgb(27, 41, 121)
HSL	hsl(231, 64%, 29%)
HSV	hsv(231, 78%, 47%)
CMYK	cmyk(77.7%, 66.1%, 0%, 52.5%)
CIE-LAB	lab(20.82, 24.73, -47.20)
CIE-LCH	lch(20.82, 53.28, 297.66°)
OKLab	oklab(32.72% -0.0014 -0.1364)
OKLCH	oklch(32.72% 0.136 269.4)
XYZ	xyz(4.6949, 3.1989, 18.4555)
Luminance	0.0320 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2979 #796B1B

analogous

#1B5879 #1B2979 #3C1B79

triadic

#1B2979 #791B29 #29791B

tetradic

#1B2979 #791B58 #796B1B #1B793C

square

#1B2979 #791B58 #796B1B #1B793C

split-complementary

#1B2979 #793C1B #58791B

monochromatic

#060819 #101847 #1B2979 #263AAB #3B52D3

Accessibility & contrast

On white

12.81

#1B2979 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.64

#1B2979 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2979

12.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2979	#FFFFFF	#000000	##FFFFFF
##1B2979	1.00	12.81	1.64	12.81
#FFFFFF	12.81	1.00	21.00	1.00
#000000	1.64	21.00	1.00	21.00
##FFFFFF	12.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00377C

Deuteranopia (green-blind)

#002E77

Tritanopia (blue-blind)

#003E4D

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #1b2979;
/* rgb */ color: rgb(27, 41, 121);
/* oklch */ color: oklch(32.7% 0.136 269.4);

Tailwind

colors: {
  custom: {
    50: '#6762a1',
    500: '#1b2979',
    950: '#000000',
  },
}

SCSS

$custom: #1b2979;
$custom-light: #6762a1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2979",
  "rgb": {
    "r": 27,
    "g": 41,
    "b": 121
  },
  "hsl": {
    "h": 231.064,
    "s": 63.514,
    "l": 29.02
  },
  "oklch": {
    "l": 0.32719,
    "c": 0.13645,
    "h": 269.4
  },
  "luminance": 0.03199
}

Semantic roles & 50–950 ramp

primary

#1B2979

secondary

#AD9D43

accent

#CE41E7

background

#F6F5FA

surface

#EBEAF3

border

#C6C6CD

text

#07050F

muted

#7A797F

Preview Lab

Preview with #1B2979

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

Preview Lab → · Contrast checker → · Palette generator →