#1B2271#1B2271

#1B2271 is a dark, vivid blue. Relative luminance 0.026; OKLCH L 30.6% C 0.134 H 271.7°. Best body text is #FFFFFF at 13.87:1 contrast (WCAG AA passes).

Color values

HEX	#1B2271
RGB	rgb(27, 34, 113)
HSL	hsl(235, 61%, 27%)
HSV	hsv(235, 76%, 44%)
CMYK	cmyk(76.1%, 69.9%, 0%, 55.7%)
CIE-LAB	lab(18.23, 26.44, -46.32)
CIE-LCH	lch(18.23, 53.33, 299.72°)
OKLab	oklab(30.58% 0.0039 -0.1339)
OKLCH	oklch(30.58% 0.134 271.7)
XYZ	xyz(4.0036, 2.5689, 15.9044)
Luminance	0.0257 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2271 #716A1B

analogous

#1B4D71 #1B2271 #3F1B71

triadic

#1B2271 #711B22 #22711B

tetradic

#1B2271 #711B4D #716A1B #1B713F

square

#1B2271 #711B4D #716A1B #1B713F

split-complementary

#1B2271 #713F1B #4D711B

monochromatic

#060719 #0F1340 #1B2271 #2731A2 #3744CF

Accessibility & contrast

On white

13.87

#1B2271 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#1B2271 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2271

13.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2271	#FFFFFF	#000000	##FFFFFF
##1B2271	1.00	13.87	1.51	13.87
#FFFFFF	13.87	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003173

Deuteranopia (green-blind)

#002870

Tritanopia (blue-blind)

#003746

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #1b2271;
/* rgb */ color: rgb(27, 34, 113);
/* oklch */ color: oklch(30.6% 0.134 271.7);

Tailwind

colors: {
  custom: {
    50: '#665d9b',
    500: '#1b2271',
    950: '#000000',
  },
}

SCSS

$custom: #1b2271;
$custom-light: #665d9b;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2271",
  "rgb": {
    "r": 27,
    "g": 34,
    "b": 113
  },
  "hsl": {
    "h": 235.116,
    "s": 61.429,
    "l": 27.451
  },
  "oklch": {
    "l": 0.30582,
    "c": 0.13398,
    "h": 271.7
  },
  "luminance": 0.02569
}

Semantic roles & 50–950 ramp

primary

#1B2271

secondary

#A69E42

accent

#D743E5

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07040E

muted

#7A797E

Preview Lab

Preview with #1B2271

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

Preview Lab → · Contrast checker → · Palette generator →