#1B3271#1B3271

#1B3271 is a dark, moderate blue. Relative luminance 0.037; OKLCH L 33.9% C 0.113 H 265.6°. Best body text is #FFFFFF at 12.06:1 contrast (WCAG AA passes).

Color values

HEX	#1B3271
RGB	rgb(27, 50, 113)
HSL	hsl(224, 61%, 27%)
HSV	hsv(224, 76%, 44%)
CMYK	cmyk(76.1%, 55.8%, 0%, 55.7%)
CIE-LAB	lab(22.67, 15.14, -39.07)
CIE-LCH	lch(22.67, 41.90, 291.19°)
OKLab	oklab(33.89% -0.0087 -0.1124)
OKLCH	oklch(33.89% 0.113 265.6)
XYZ	xyz(4.5722, 3.7060, 16.0939)
Luminance	0.0371 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3271 #715A1B

analogous

#1B5D71 #1B3271 #2F1B71

triadic

#1B3271 #711B32 #32711B

tetradic

#1B3271 #711B5D #715A1B #1B712F

square

#1B3271 #711B5D #715A1B #1B712F

split-complementary

#1B3271 #712F1B #5D711B

monochromatic

#060B19 #0F1C40 #1B3271 #2748A2 #3760CF

Accessibility & contrast

On white

12.06

#1B3271 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.74

#1B3271 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3271

12.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3271	#FFFFFF	#000000	##FFFFFF
##1B3271	1.00	12.06	1.74	12.06
#FFFFFF	12.06	1.00	21.00	1.00
#000000	1.74	21.00	1.00	21.00
##FFFFFF	12.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#053A73

Deuteranopia (green-blind)

#003270

Tritanopia (blue-blind)

#00414C

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #1b3271;
/* rgb */ color: rgb(27, 50, 113);
/* oklch */ color: oklch(33.9% 0.113 265.6);

Tailwind

colors: {
  custom: {
    50: '#64699a',
    500: '#1b3271',
    950: '#000000',
  },
}

SCSS

$custom: #1b3271;
$custom-light: #64699a;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3271",
  "rgb": {
    "r": 27,
    "g": 50,
    "b": 113
  },
  "hsl": {
    "h": 223.953,
    "s": 61.429,
    "l": 27.451
  },
  "oklch": {
    "l": 0.33886,
    "c": 0.11278,
    "h": 265.6
  },
  "luminance": 0.03706
}

Semantic roles & 50–950 ramp

primary

#1B3271

secondary

#A68B42

accent

#B943E5

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060E

muted

#7A7A7E

Preview Lab

Preview with #1B3271

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

Preview Lab → · Contrast checker → · Palette generator →