#4283F0#4283F0

#4283F0 is a light, vivid blue. Relative luminance 0.237; OKLCH L 62.4% C 0.177 H 260.1°. Best body text is #000000 at 5.74:1 contrast (WCAG AA passes).

Color values

HEX	#4283F0
RGB	rgb(66, 131, 240)
HSL	hsl(218, 85%, 60%)
HSV	hsv(218, 73%, 94%)
CMYK	cmyk(72.5%, 45.4%, 0%, 5.9%)
CIE-LAB	lab(55.77, 15.60, -60.87)
CIE-LCH	lch(55.77, 62.83, 284.37°)
OKLab	oklab(62.36% -0.0304 -0.1745)
OKLCH	oklch(62.36% 0.177 260.1)
XYZ	xyz(26.0856, 23.6793, 85.6170)
Luminance	0.2368 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4283F0 #F0AF42

analogous

#42DAF0 #4283F0 #5842F0

triadic

#4283F0 #F04283 #83F042

tetradic

#4283F0 #F042DA #F0AF42 #42F058

square

#4283F0 #F042DA #F0AF42 #42F058

split-complementary

#4283F0 #F05842 #DAF042

monochromatic

#0E48AA #1260E3 #4283F0 #7BA8F4 #B3CDF9

Accessibility & contrast

On white

3.66

#4283F0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.74

#4283F0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4283F0

5.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4283F0	#FFFFFF	#000000	##000000
##4283F0	1.00	3.66	5.74	5.74
#FFFFFF	3.66	1.00	21.00	21.00
#000000	5.74	21.00	1.00	1.00
##000000	5.74	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4A8EF4

Deuteranopia (green-blind)

#237EEE

Tritanopia (blue-blind)

#009DAE

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #4283f0;
/* rgb */ color: rgb(66, 131, 240);
/* oklch */ color: oklch(62.4% 0.177 260.1);

Tailwind

colors: {
  custom: {
    50: '#8ba6f5',
    500: '#4283f0',
    950: '#000000',
  },
}

SCSS

$custom: #4283f0;
$custom-light: #8ba6f5;
$custom-dark: #000000;

JSON

{
  "hex": "#4283f0",
  "rgb": {
    "r": 66,
    "g": 131,
    "b": 240
  },
  "hsl": {
    "h": 217.586,
    "s": 85.294,
    "l": 60
  },
  "oklch": {
    "l": 0.62359,
    "c": 0.1771,
    "h": 260.1
  },
  "luminance": 0.23682
}

Semantic roles & 50–950 ramp

primary

#4283F0

secondary

#E8CFA5

accent

#AE2CFC

background

#F9FAFF

surface

#F2F4FE

border

#CCCED6

text

#0E0F17

muted

#7E7F85

Preview Lab

Preview with #4283F0

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

Preview Lab → · Contrast checker → · Palette generator →