#2143B3#2143B3

#2143B3 is a dark, vivid blue. Relative luminance 0.076; OKLCH L 43.5% C 0.182 H 265.8°. Best body text is #FFFFFF at 8.34:1 contrast (WCAG AA passes).

Color values

HEX	#2143B3
RGB	rgb(33, 67, 179)
HSL	hsl(226, 69%, 42%)
HSV	hsv(226, 82%, 70%)
CMYK	cmyk(81.6%, 62.6%, 0%, 29.8%)
CIE-LAB	lab(33.12, 30.23, -62.66)
CIE-LCH	lch(33.12, 69.57, 295.76°)
OKLab	oklab(43.49% -0.0132 -0.1813)
OKLCH	oklch(43.49% 0.182 265.8)
XYZ	xyz(10.7682, 7.5910, 43.5368)
Luminance	0.0759 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2143B3 #B39121

analogous

#218CB3 #2143B3 #4821B3

triadic

#2143B3 #B32143 #43B321

tetradic

#2143B3 #B3218C #B39121 #21B348

square

#2143B3 #B3218C #B39121 #21B348

split-complementary

#2143B3 #B34821 #8CB321

monochromatic

#0E1C4C #17307F #2143B3 #375DDA #6B87E4

Accessibility & contrast

On white

8.34

#2143B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#2143B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2143B3

8.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2143B3	#FFFFFF	#000000	##FFFFFF
##2143B3	1.00	8.34	2.52	8.34
#FFFFFF	8.34	1.00	21.00	1.00
#000000	2.52	21.00	1.00	21.00
##FFFFFF	8.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055B7

Deuteranopia (green-blind)

#0047B1

Tritanopia (blue-blind)

#006074

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #2143b3;
/* rgb */ color: rgb(33, 67, 179);
/* oklch */ color: oklch(43.5% 0.182 265.8);

Tailwind

colors: {
  custom: {
    50: '#7676cb',
    500: '#2143b3',
    950: '#000000',
  },
}

SCSS

$custom: #2143b3;
$custom-light: #7676cb;
$custom-dark: #000000;

JSON

{
  "hex": "#2143b3",
  "rgb": {
    "r": 33,
    "g": 67,
    "b": 179
  },
  "hsl": {
    "h": 226.027,
    "s": 68.868,
    "l": 41.569
  },
  "oklch": {
    "l": 0.43491,
    "c": 0.18182,
    "h": 265.8
  },
  "luminance": 0.07592
}

Semantic roles & 50–950 ramp

primary

#2143B3

secondary

#CAB266

accent

#C33CEC

background

#F7F7FC

surface

#EEEDF9

border

#C9C8D2

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #2143B3

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

Preview Lab → · Contrast checker → · Palette generator →