#1B1971#1B1971

#1B1971 is a dark, vivid blue. Relative luminance 0.021; OKLCH L 29.1% C 0.144 H 273.7°. Best body text is #FFFFFF at 14.75:1 contrast (WCAG AA passes).

Color values

HEX	#1B1971
RGB	rgb(27, 25, 113)
HSL	hsl(241, 64%, 27%)
HSV	hsv(241, 78%, 44%)
CMYK	cmyk(76.1%, 77.9%, 0%, 55.7%)
CIE-LAB	lab(16.11, 32.27, -49.81)
CIE-LCH	lch(16.11, 59.35, 302.94°)
OKLab	oklab(29.06% 0.0093 -0.1441)
OKLCH	oklch(29.06% 0.144 273.7)
XYZ	xyz(3.7793, 2.1201, 15.8296)
Luminance	0.0212 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1971 #6F7119

analogous

#194371 #1B1971 #471971

triadic

#1B1971 #711B19 #19711B

tetradic

#1B1971 #711943 #6F7119 #197147

square

#1B1971 #711943 #6F7119 #197147

split-complementary

#1B1971 #714719 #437119

monochromatic

#060619 #0F0E3F #1B1971 #2724A3 #3633D2

Accessibility & contrast

On white

14.75

#1B1971 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.42

#1B1971 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1971

14.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1971	#FFFFFF	#000000	##FFFFFF
##1B1971	1.00	14.75	1.42	14.75
#FFFFFF	14.75	1.00	21.00	1.00
#000000	1.42	21.00	1.00	21.00
##FFFFFF	14.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002C74

Deuteranopia (green-blind)

#00246F

Tritanopia (blue-blind)

#003343

Achromatopsia (no color)

#282828

Design tokens & code

CSS

--color: #1b1971;
/* rgb */ color: rgb(27, 25, 113);
/* oklch */ color: oklch(29.1% 0.144 273.7);

Tailwind

colors: {
  custom: {
    50: '#67579b',
    500: '#1b1971',
    950: '#000000',
  },
}

SCSS

$custom: #1b1971;
$custom-light: #67579b;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1971",
  "rgb": {
    "r": 27,
    "g": 25,
    "b": 113
  },
  "hsl": {
    "h": 241.364,
    "s": 63.768,
    "l": 27.059
  },
  "oklch": {
    "l": 0.29057,
    "c": 0.14439,
    "h": 273.7
  },
  "luminance": 0.02121
}

Semantic roles & 50–950 ramp

primary

#1B1971

secondary

#A4A640

accent

#E741E3

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07030E

muted

#7A787E

Preview Lab

Preview with #1B1971

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

Preview Lab → · Contrast checker → · Palette generator →