#4283EA#4283EA

#4283EA is a mid, vivid blue. Relative luminance 0.233; OKLCH L 62.0% C 0.169 H 259.3°. Best body text is #000000 at 5.67:1 contrast (WCAG AA passes).

Color values

HEX	#4283EA
RGB	rgb(66, 131, 234)
HSL	hsl(217, 80%, 59%)
HSV	hsv(217, 72%, 92%)
CMYK	cmyk(71.8%, 44%, 0%, 8.2%)
CIE-LAB	lab(55.41, 13.45, -58.10)
CIE-LCH	lch(55.41, 59.64, 283.04°)
OKLab	oklab(61.97% -0.0314 -0.1663)
OKLCH	oklch(61.97% 0.169 259.3)
XYZ	xyz(25.2090, 23.3286, 81.0003)
Luminance	0.2333 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4283EA #EAA942

analogous

#42D7EA #4283EA #5542EA

triadic

#4283EA #EA4283 #83EA42

tetradic

#4283EA #EA42D7 #EAA942 #42EA55

square

#4283EA #EA42D7 #EAA942 #42EA55

split-complementary

#4283EA #EA5542 #D7EA42

monochromatic

#1249A0 #1862D7 #4283EA #79A7F0 #B0CBF6

Accessibility & contrast

On white

3.71

#4283EA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.67

#4283EA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4283EA

5.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4283EA	#FFFFFF	#000000	##000000
##4283EA	1.00	3.71	5.67	5.67
#FFFFFF	3.71	1.00	21.00	21.00
#000000	5.67	21.00	1.00	1.00
##000000	5.67	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4F8DEE

Deuteranopia (green-blind)

#2E7EE8

Tritanopia (blue-blind)

#009BAB

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #4283ea;
/* rgb */ color: rgb(66, 131, 234);
/* oklch */ color: oklch(62.0% 0.169 259.3);

Tailwind

colors: {
  custom: {
    50: '#8aa6f1',
    500: '#4283ea',
    950: '#000000',
  },
}

SCSS

$custom: #4283ea;
$custom-light: #8aa6f1;
$custom-dark: #000000;

JSON

{
  "hex": "#4283ea",
  "rgb": {
    "r": 66,
    "g": 131,
    "b": 234
  },
  "hsl": {
    "h": 216.786,
    "s": 80,
    "l": 58.824
  },
  "oklch": {
    "l": 0.6197,
    "c": 0.16928,
    "h": 259.3
  },
  "luminance": 0.23331
}

Semantic roles & 50–950 ramp

primary

#4283EA

secondary

#E5CBA3

accent

#AA31F6

background

#F9FAFE

surface

#F2F4FD

border

#CCCED5

text

#0D0F17

muted

#7E7F85

Preview Lab

Preview with #4283EA

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

Preview Lab → · Contrast checker → · Palette generator →