#4143CB#4143CB

#4143CB is a mid, highly saturated blue. Relative luminance 0.095; OKLCH L 47.3% C 0.205 H 274.6°. Best body text is #FFFFFF at 7.27:1 contrast (WCAG AA passes).

Color values

HEX	#4143CB
RGB	rgb(65, 67, 203)
HSL	hsl(239, 57%, 53%)
HSV	hsv(239, 68%, 80%)
CMYK	cmyk(68%, 67%, 0%, 20.4%)
CIE-LAB	lab(36.83, 42.25, -70.59)
CIE-LCH	lch(36.83, 82.26, 300.90°)
OKLab	oklab(47.3% 0.0166 -0.2039)
OKLCH	oklch(47.3% 0.205 274.6)
XYZ	xyz(14.9631, 9.4485, 57.5235)
Luminance	0.0945 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue Blue

#2242C7

ΔE00 3.03

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4143CB #CBC941

analogous

#4188CB #4143CB #8441CB

triadic

#4143CB #CB4143 #43CB41

tetradic

#4143CB #CB4188 #CBC941 #41CB84

square

#4143CB #CB4188 #CBC941 #41CB84

split-complementary

#4143CB #CB8441 #88CB41

monochromatic

#1F2072 #2C2EA2 #4143CB #7173D8 #A1A2E5

Accessibility & contrast

On white

7.27

#4143CB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.89

#4143CB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4143CB

7.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4143CB	#FFFFFF	#000000	##FFFFFF
##4143CB	1.00	7.27	2.89	7.27
#FFFFFF	7.27	1.00	21.00	1.00
#000000	2.89	21.00	1.00	21.00
##FFFFFF	7.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005DCF

Deuteranopia (green-blind)

#0050C8

Tritanopia (blue-blind)

#006781

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #4143cb;
/* rgb */ color: rgb(65, 67, 203);
/* oklch */ color: oklch(47.3% 0.205 274.6);

Tailwind

colors: {
  custom: {
    50: '#8778dc',
    500: '#4143cb',
    950: '#000000',
  },
}

SCSS

$custom: #4143cb;
$custom-light: #8778dc;
$custom-dark: #000000;

JSON

{
  "hex": "#4143cb",
  "rgb": {
    "r": 65,
    "g": 67,
    "b": 203
  },
  "hsl": {
    "h": 239.13,
    "s": 57.025,
    "l": 52.549
  },
  "oklch": {
    "l": 0.47297,
    "c": 0.20454,
    "h": 274.6
  },
  "luminance": 0.0945
}

Semantic roles & 50–950 ramp

primary

#4143CB

secondary

#D2D196

accent

#DE48E0

background

#F9F7FD

surface

#F1EDFB

border

#CBC8D4

text

#0D0915

muted

#7E7B83

Preview Lab

Preview with #4143CB

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

Preview Lab → · Contrast checker → · Palette generator →