#4283CB#4283CB

#4283CB is a mid, vivid cyan. Relative luminance 0.217; OKLCH L 60.1% C 0.129 H 252.8°. Best body text is #000000 at 5.34:1 contrast (WCAG AA passes).

Color values

HEX	#4283CB
RGB	rgb(66, 131, 203)
HSL	hsl(212, 57%, 53%)
HSV	hsv(212, 67%, 80%)
CMYK	cmyk(67.5%, 35.5%, 0%, 20.4%)
CIE-LAB	lab(53.71, 2.47, -43.38)
CIE-LCH	lch(53.71, 43.45, 273.26°)
OKLab	oklab(60.1% -0.0382 -0.1232)
OKLCH	oklch(60.1% 0.129 252.8)
XYZ	xyz(21.1386, 21.7005, 59.5629)
Luminance	0.2170 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4283CB #CB8A42

analogous

#42C7CB #4283CB #4642CB

triadic

#4283CB #CB4283 #83CB42

tetradic

#4283CB #CB42C7 #CB8A42 #42CB46

square

#4283CB #CB42C7 #CB8A42 #42CB46

split-complementary

#4283CB #CB4642 #C7CB42

monochromatic

#204773 #2D65A3 #4283CB #72A2D8 #A2C2E5

Accessibility & contrast

On white

3.93

#4283CB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.34

#4283CB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4283CB

5.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4283CB	#FFFFFF	#000000	##000000
##4283CB	1.00	3.93	5.34	5.34
#FFFFFF	3.93	1.00	21.00	21.00
#000000	5.34	21.00	1.00	1.00
##000000	5.34	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6387CE

Deuteranopia (green-blind)

#507ACA

Tritanopia (blue-blind)

#00949D

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #4283cb;
/* rgb */ color: rgb(66, 131, 203);
/* oklch */ color: oklch(60.1% 0.129 252.8);

Tailwind

colors: {
  custom: {
    50: '#85a6db',
    500: '#4283cb',
    950: '#000000',
  },
}

SCSS

$custom: #4283cb;
$custom-light: #85a6db;
$custom-dark: #000000;

JSON

{
  "hex": "#4283cb",
  "rgb": {
    "r": 66,
    "g": 131,
    "b": 203
  },
  "hsl": {
    "h": 211.533,
    "s": 56.846,
    "l": 52.745
  },
  "oklch": {
    "l": 0.60096,
    "c": 0.12895,
    "h": 252.8
  },
  "luminance": 0.21703
}

Semantic roles & 50–950 ramp

primary

#4283CB

secondary

#D2B697

accent

#9848E0

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C0F15

muted

#7D7F83

Preview Lab

Preview with #4283CB

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

Preview Lab → · Contrast checker → · Palette generator →