#1B43A0#1B43A0

#1B43A0 is a dark, vivid blue. Relative luminance 0.068; OKLCH L 41.6% C 0.158 H 263.5°. Best body text is #FFFFFF at 8.91:1 contrast (WCAG AA passes).

Color values

HEX	#1B43A0
RGB	rgb(27, 67, 160)
HSL	hsl(222, 71%, 37%)
HSV	hsv(222, 83%, 63%)
CMYK	cmyk(83.1%, 58.1%, 0%, 37.3%)
CIE-LAB	lab(31.31, 22.29, -54.24)
CIE-LCH	lch(31.31, 58.64, 292.34°)
OKLab	oklab(41.59% -0.0179 -0.1567)
OKLCH	oklch(41.59% 0.158 263.5)
XYZ	xyz(8.8020, 6.7843, 34.0965)
Luminance	0.0678 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B43A0 #A0781B

analogous

#1B86A0 #1B43A0 #361BA0

triadic

#1B43A0 #A01B43 #43A01B

tetradic

#1B43A0 #A01B86 #A0781B #1BA036

square

#1B43A0 #A01B86 #A0781B #1BA036

split-complementary

#1B43A0 #A0361B #86A01B

monochromatic

#091737 #122D6C #1B43A0 #2459D4 #537EE2

Accessibility & contrast

On white

8.91

#1B43A0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.36

#1B43A0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B43A0

8.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B43A0	#FFFFFF	#000000	##FFFFFF
##1B43A0	1.00	8.91	2.36	8.91
#FFFFFF	8.91	1.00	21.00	1.00
#000000	2.36	21.00	1.00	21.00
##FFFFFF	8.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050A3

Deuteranopia (green-blind)

#00449E

Tritanopia (blue-blind)

#005A6B

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #1b43a0;
/* rgb */ color: rgb(27, 67, 160);
/* oklch */ color: oklch(41.6% 0.158 263.5);

Tailwind

colors: {
  custom: {
    50: '#7076bd',
    500: '#1b43a0',
    950: '#000000',
  },
}

SCSS

$custom: #1b43a0;
$custom-light: #7076bd;
$custom-dark: #000000;

JSON

{
  "hex": "#1b43a0",
  "rgb": {
    "r": 27,
    "g": 67,
    "b": 160
  },
  "hsl": {
    "h": 221.955,
    "s": 71.123,
    "l": 36.667
  },
  "oklch": {
    "l": 0.41588,
    "c": 0.15777,
    "h": 263.5
  },
  "luminance": 0.06785
}

Semantic roles & 50–950 ramp

primary

#1B43A0

secondary

#C5A252

accent

#B83AEE

background

#F7F7FB

surface

#EDEDF7

border

#C8C8D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1B43A0

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

Preview Lab → · Contrast checker → · Palette generator →