#1B2379#1B2379

#1B2379 is a dark, vivid blue. Relative luminance 0.028; OKLCH L 31.6% C 0.144 H 271.0°. Best body text is #FFFFFF at 13.43:1 contrast (WCAG AA passes).

Color values

HEX	#1B2379
RGB	rgb(27, 35, 121)
HSL	hsl(235, 64%, 29%)
HSV	hsv(235, 78%, 47%)
CMYK	cmyk(77.7%, 71.1%, 0%, 52.5%)
CIE-LAB	lab(19.29, 28.82, -49.72)
CIE-LCH	lch(19.29, 57.46, 300.10°)
OKLab	oklab(31.6% 0.0024 -0.1438)
OKLCH	oklch(31.6% 0.144 271)
XYZ	xyz(4.5030, 2.8151, 18.3915)
Luminance	0.0282 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2379 #79711B

analogous

#1B5279 #1B2379 #421B79

triadic

#1B2379 #791B23 #23791B

tetradic

#1B2379 #791B52 #79711B #1B7942

square

#1B2379 #791B52 #79711B #1B7942

split-complementary

#1B2379 #79421B #52791B

monochromatic

#060719 #101547 #1B2379 #2631AB #3B48D3

Accessibility & contrast

On white

13.43

#1B2379 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.56

#1B2379 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2379

13.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2379	#FFFFFF	#000000	##FFFFFF
##1B2379	1.00	13.43	1.56	13.43
#FFFFFF	13.43	1.00	21.00	1.00
#000000	1.56	21.00	1.00	21.00
##FFFFFF	13.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00337C

Deuteranopia (green-blind)

#002A77

Tritanopia (blue-blind)

#003A4B

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1b2379;
/* rgb */ color: rgb(27, 35, 121);
/* oklch */ color: oklch(31.6% 0.144 271.0);

Tailwind

colors: {
  custom: {
    50: '#685ea1',
    500: '#1b2379',
    950: '#000000',
  },
}

SCSS

$custom: #1b2379;
$custom-light: #685ea1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2379",
  "rgb": {
    "r": 27,
    "g": 35,
    "b": 121
  },
  "hsl": {
    "h": 234.894,
    "s": 63.514,
    "l": 29.02
  },
  "oklch": {
    "l": 0.31598,
    "c": 0.14387,
    "h": 271
  },
  "luminance": 0.02816
}

Semantic roles & 50–950 ramp

primary

#1B2379

secondary

#ADA443

accent

#D841E7

background

#F6F5FA

surface

#ECE9F3

border

#C7C5CD

text

#07040F

muted

#7A797F

Preview Lab

Preview with #1B2379

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

Preview Lab → · Contrast checker → · Palette generator →