#4237A3#4237A3

#4237A3 is a dark, vivid blue. Relative luminance 0.065; OKLCH L 41.8% C 0.167 H 281.0°. Best body text is #FFFFFF at 9.10:1 contrast (WCAG AA passes).

Color values

HEX	#4237A3
RGB	rgb(66, 55, 163)
HSL	hsl(246, 50%, 43%)
HSV	hsv(246, 66%, 64%)
CMYK	cmyk(59.5%, 66.3%, 0%, 36.1%)
CIE-LAB	lab(30.72, 36.38, -56.92)
CIE-LCH	lch(30.72, 67.56, 302.59°)
OKLab	oklab(41.81% 0.0318 -0.1638)
OKLCH	oklch(41.81% 0.167 281)
XYZ	xyz(10.2217, 6.5343, 35.3658)
Luminance	0.0654 (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

#4237A3 #98A337

analogous

#3762A3 #4237A3 #7837A3

triadic

#4237A3 #A34237 #37A342

tetradic

#4237A3 #A33762 #98A337 #37A378

square

#4237A3 #A33762 #98A337 #37A378

split-complementary

#4237A3 #A37837 #62A337

monochromatic

#1D1847 #2F2875 #4237A3 #5E52C5 #8980D4

Accessibility & contrast

On white

9.10

#4237A3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.31

#4237A3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4237A3

9.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4237A3	#FFFFFF	#000000	##FFFFFF
##4237A3	1.00	9.10	2.31	9.10
#FFFFFF	9.10	1.00	21.00	1.00
#000000	2.31	21.00	1.00	21.00
##FFFFFF	9.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA6

Deuteranopia (green-blind)

#0044A1

Tritanopia (blue-blind)

#005268

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #4237a3;
/* rgb */ color: rgb(66, 55, 163);
/* oklch */ color: oklch(41.8% 0.167 281.0);

Tailwind

colors: {
  custom: {
    50: '#816fbf',
    500: '#4237a3',
    950: '#000000',
  },
}

SCSS

$custom: #4237a3;
$custom-light: #816fbf;
$custom-dark: #000000;

JSON

{
  "hex": "#4237a3",
  "rgb": {
    "r": 66,
    "g": 55,
    "b": 163
  },
  "hsl": {
    "h": 246.111,
    "s": 49.541,
    "l": 42.745
  },
  "oklch": {
    "l": 0.41811,
    "c": 0.16687,
    "h": 281
  },
  "luminance": 0.06535
}

Semantic roles & 50–950 ramp

primary

#4237A3

secondary

#B7BE78

accent

#D94FCB

background

#F8F6FB

surface

#EFECF7

border

#CAC7D0

text

#0B0712

muted

#7C7A81

Preview Lab

Preview with #4237A3

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

Preview Lab → · Contrast checker → · Palette generator →