#4237A5#4237A5

#4237A5 is a dark, vivid blue. Relative luminance 0.066; OKLCH L 42.0% C 0.170 H 280.7°. Best body text is #FFFFFF at 9.05:1 contrast (WCAG AA passes).

Color values

HEX	#4237A5
RGB	rgb(66, 55, 165)
HSL	hsl(246, 50%, 43%)
HSV	hsv(246, 67%, 65%)
CMYK	cmyk(60%, 66.7%, 0%, 35.3%)
CIE-LAB	lab(30.89, 37.04, -57.85)
CIE-LCH	lch(30.89, 68.69, 302.63°)
OKLab	oklab(41.99% 0.0315 -0.1665)
OKLCH	oklch(41.99% 0.17 280.7)
XYZ	xyz(10.4024, 6.6065, 36.3170)
Luminance	0.0661 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4237A5 #9AA537

analogous

#3763A5 #4237A5 #7937A5

triadic

#4237A5 #A54237 #37A542

tetradic

#4237A5 #A53763 #9AA537 #37A579

square

#4237A5 #A53763 #9AA537 #37A579

split-complementary

#4237A5 #A57937 #63A537

monochromatic

#1D1849 #302877 #4237A5 #5F53C6 #8A81D5

Accessibility & contrast

On white

9.05

#4237A5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.32

#4237A5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4237A5

9.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4237A5	#FFFFFF	#000000	##FFFFFF
##4237A5	1.00	9.05	2.32	9.05
#FFFFFF	9.05	1.00	21.00	1.00
#000000	2.32	21.00	1.00	21.00
##FFFFFF	9.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DA8

Deuteranopia (green-blind)

#0045A3

Tritanopia (blue-blind)

#005369

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #4237a5;
/* rgb */ color: rgb(66, 55, 165);
/* oklch */ color: oklch(42.0% 0.170 280.7);

Tailwind

colors: {
  custom: {
    50: '#816fc1',
    500: '#4237a5',
    950: '#000000',
  },
}

SCSS

$custom: #4237a5;
$custom-light: #816fc1;
$custom-dark: #000000;

JSON

{
  "hex": "#4237a5",
  "rgb": {
    "r": 66,
    "g": 55,
    "b": 165
  },
  "hsl": {
    "h": 246,
    "s": 50,
    "l": 43.137
  },
  "oklch": {
    "l": 0.41989,
    "c": 0.1695,
    "h": 280.7
  },
  "luminance": 0.06607
}

Semantic roles & 50–950 ramp

primary

#4237A5

secondary

#B8BF79

accent

#DA4ECC

background

#F8F6FC

surface

#F0ECF8

border

#CBC7D1

text

#0B0712

muted

#7C7A81

Preview Lab

Preview with #4237A5

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

Preview Lab → · Contrast checker → · Palette generator →