#143B8B#143B8B

#143B8B is a dark, vivid blue. Relative luminance 0.051; OKLCH L 37.8% C 0.141 H 262.4°. Best body text is #FFFFFF at 10.35:1 contrast (WCAG AA passes).

Color values

HEX	#143B8B
RGB	rgb(20, 59, 139)
HSL	hsl(220, 75%, 31%)
HSV	hsv(220, 86%, 55%)
CMYK	cmyk(85.6%, 57.6%, 0%, 45.5%)
CIE-LAB	lab(27.13, 18.68, -48.22)
CIE-LCH	lch(27.13, 51.71, 291.18°)
OKLab	oklab(37.84% -0.0187 -0.1393)
OKLCH	oklch(37.84% 0.141 262.4)
XYZ	xyz(6.5110, 5.1399, 25.0700)
Luminance	0.0514 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#143B8B #8B6414

analogous

#14768B #143B8B #28148B

triadic

#143B8B #8B143B #3B8B14

tetradic

#143B8B #8B1476 #8B6414 #148B28

square

#143B8B #8B1476 #8B6414 #148B28

split-complementary

#143B8B #8B2814 #768B14

monochromatic

#050E20 #0C2455 #143B8B #1C52C1 #376FE2

Accessibility & contrast

On white

10.35

#143B8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#143B8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #143B8B

10.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##143B8B	#FFFFFF	#000000	##FFFFFF
##143B8B	1.00	10.35	2.03	10.35
#FFFFFF	10.35	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00468E

Deuteranopia (green-blind)

#003B89

Tritanopia (blue-blind)

#004F5D

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #143b8b;
/* rgb */ color: rgb(20, 59, 139);
/* oklch */ color: oklch(37.8% 0.141 262.4);

Tailwind

colors: {
  custom: {
    50: '#6970ae',
    500: '#143b8b',
    950: '#000000',
  },
}

SCSS

$custom: #143b8b;
$custom-light: #6970ae;
$custom-dark: #000000;

JSON

{
  "hex": "#143b8b",
  "rgb": {
    "r": 20,
    "g": 59,
    "b": 139
  },
  "hsl": {
    "h": 220.336,
    "s": 74.843,
    "l": 31.176
  },
  "oklch": {
    "l": 0.37839,
    "c": 0.14055,
    "h": 262.4
  },
  "luminance": 0.05141
}

Semantic roles & 50–950 ramp

primary

#143B8B

secondary

#BF943C

accent

#B436F1

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #143B8B

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

Preview Lab → · Contrast checker → · Palette generator →