#4237E5#4237E5

#4237E5 is a mid, highly saturated blue. Relative luminance 0.095; OKLCH L 48.2% C 0.247 H 274.6°. Best body text is #FFFFFF at 7.22:1 contrast (WCAG AA passes).

Color values

HEX	#4237E5
RGB	rgb(66, 55, 229)
HSL	hsl(244, 77%, 56%)
HSV	hsv(244, 76%, 90%)
CMYK	cmyk(71.2%, 76%, 0%, 10.2%)
CIE-LAB	lab(37.02, 57.29, -85.24)
CIE-LCH	lch(37.02, 102.70, 303.90°)
OKLab	oklab(48.19% 0.02 -0.2465)
OKLCH	oklch(48.19% 0.247 274.6)
XYZ	xyz(17.7511, 9.5460, 75.0206)
Luminance	0.0955 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 4.00

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4237E5 #DAE537

analogous

#3783E5 #4237E5 #9937E5

triadic

#4237E5 #E54237 #37E542

tetradic

#4237E5 #E53783 #DAE537 #37E599

square

#4237E5 #E53783 #DAE537 #37E599

split-complementary

#4237E5 #E59937 #83E537

monochromatic

#1A138F #241AC5 #4237E5 #756DEC #A8A3F3

Accessibility & contrast

On white

7.22

#4237E5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.91

#4237E5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4237E5

7.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4237E5	#FFFFFF	#000000	##FFFFFF
##4237E5	1.00	7.22	2.91	7.22
#FFFFFF	7.22	1.00	21.00	1.00
#000000	2.91	21.00	1.00	21.00
##FFFFFF	7.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005FEA

Deuteranopia (green-blind)

#004FE2

Tritanopia (blue-blind)

#006B8D

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #4237e5;
/* rgb */ color: rgb(66, 55, 229);
/* oklch */ color: oklch(48.2% 0.247 274.6);

Tailwind

colors: {
  custom: {
    50: '#8e71ef',
    500: '#4237e5',
    950: '#000000',
  },
}

SCSS

$custom: #4237e5;
$custom-light: #8e71ef;
$custom-dark: #000000;

JSON

{
  "hex": "#4237e5",
  "rgb": {
    "r": 66,
    "g": 55,
    "b": 229
  },
  "hsl": {
    "h": 243.793,
    "s": 76.991,
    "l": 55.686
  },
  "oklch": {
    "l": 0.48193,
    "c": 0.24734,
    "h": 274.6
  },
  "luminance": 0.09548
}

Semantic roles & 50–950 ramp

primary

#4237E5

secondary

#DBE098

accent

#F434E7

background

#F9F7FE

surface

#F2EDFD

border

#CCC8D5

text

#0E0817

muted

#7E7B85

Preview Lab

Preview with #4237E5

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

Preview Lab → · Contrast checker → · Palette generator →