#1B2374#1B2374

#1B2374 is a dark, vivid blue. Relative luminance 0.027; OKLCH L 31.1% C 0.137 H 271.2°. Best body text is #FFFFFF at 13.64:1 contrast (WCAG AA passes).

Color values

HEX	#1B2374
RGB	rgb(27, 35, 116)
HSL	hsl(235, 62%, 28%)
HSV	hsv(235, 77%, 45%)
CMYK	cmyk(76.7%, 69.8%, 0%, 54.5%)
CIE-LAB	lab(18.78, 26.91, -47.34)
CIE-LCH	lch(18.78, 54.46, 299.62°)
OKLab	oklab(31.08% 0.003 -0.1369)
OKLCH	oklch(31.08% 0.137 271.2)
XYZ	xyz(4.2043, 2.6956, 16.8183)
Luminance	0.0270 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2374 #746C1B

analogous

#1B4F74 #1B2374 #3F1B74

triadic

#1B2374 #741B23 #23741B

tetradic

#1B2374 #741B4F #746C1B #1B743F

square

#1B2374 #741B4F #746C1B #1B743F

split-complementary

#1B2374 #743F1B #4F741B

monochromatic

#060719 #0F1442 #1B2374 #2732A6 #3946D1

Accessibility & contrast

On white

13.64

#1B2374 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#1B2374 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2374

13.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2374	#FFFFFF	#000000	##FFFFFF
##1B2374	1.00	13.64	1.54	13.64
#FFFFFF	13.64	1.00	21.00	1.00
#000000	1.54	21.00	1.00	21.00
##FFFFFF	13.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003277

Deuteranopia (green-blind)

#002972

Tritanopia (blue-blind)

#003948

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1b2374;
/* rgb */ color: rgb(27, 35, 116);
/* oklch */ color: oklch(31.1% 0.137 271.2);

Tailwind

colors: {
  custom: {
    50: '#675e9d',
    500: '#1b2374',
    950: '#000000',
  },
}

SCSS

$custom: #1b2374;
$custom-light: #675e9d;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2374",
  "rgb": {
    "r": 27,
    "g": 35,
    "b": 116
  },
  "hsl": {
    "h": 234.607,
    "s": 62.238,
    "l": 28.039
  },
  "oklch": {
    "l": 0.31076,
    "c": 0.13694,
    "h": 271.2
  },
  "luminance": 0.02696
}

Semantic roles & 50–950 ramp

primary

#1B2374

secondary

#A99F42

accent

#D742E5

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07040E

muted

#7A797E

Preview Lab

Preview with #1B2374

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

Preview Lab → · Contrast checker → · Palette generator →