#1B2779#1B2779

#1B2779 is a dark, vivid blue. Relative luminance 0.031; OKLCH L 32.3% C 0.139 H 270.0°. Best body text is #FFFFFF at 13.02:1 contrast (WCAG AA passes).

Color values

HEX	#1B2779
RGB	rgb(27, 39, 121)
HSL	hsl(232, 64%, 29%)
HSV	hsv(232, 78%, 47%)
CMYK	cmyk(77.7%, 67.8%, 0%, 52.5%)
CIE-LAB	lab(20.30, 26.12, -48.06)
CIE-LCH	lch(20.30, 54.69, 298.52°)
OKLab	oklab(32.33% -0.0001 -0.139)
OKLCH	oklch(32.33% 0.139 270)
XYZ	xyz(4.6275, 3.0640, 18.4330)
Luminance	0.0307 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2779 #796D1B

analogous

#1B5679 #1B2779 #3E1B79

triadic

#1B2779 #791B27 #27791B

tetradic

#1B2779 #791B56 #796D1B #1B793E

square

#1B2779 #791B56 #796D1B #1B793E

split-complementary

#1B2779 #793E1B #56791B

monochromatic

#060819 #101747 #1B2779 #2637AB #3B4FD3

Accessibility & contrast

On white

13.02

#1B2779 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.61

#1B2779 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2779

13.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2779	#FFFFFF	#000000	##FFFFFF
##1B2779	1.00	13.02	1.61	13.02
#FFFFFF	13.02	1.00	21.00	1.00
#000000	1.61	21.00	1.00	21.00
##FFFFFF	13.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00357C

Deuteranopia (green-blind)

#002D77

Tritanopia (blue-blind)

#003D4C

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #1b2779;
/* rgb */ color: rgb(27, 39, 121);
/* oklch */ color: oklch(32.3% 0.139 270.0);

Tailwind

colors: {
  custom: {
    50: '#6861a1',
    500: '#1b2779',
    950: '#000000',
  },
}

SCSS

$custom: #1b2779;
$custom-light: #6861a1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2779",
  "rgb": {
    "r": 27,
    "g": 39,
    "b": 121
  },
  "hsl": {
    "h": 232.34,
    "s": 63.514,
    "l": 29.02
  },
  "oklch": {
    "l": 0.32334,
    "c": 0.13898,
    "h": 270
  },
  "luminance": 0.03065
}

Semantic roles & 50–950 ramp

primary

#1B2779

secondary

#ADA043

accent

#D141E7

background

#F6F5FA

surface

#EBE9F3

border

#C6C5CD

text

#07050F

muted

#7A797F

Preview Lab

Preview with #1B2779

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

Preview Lab → · Contrast checker → · Palette generator →