#4289D3#4289D3

#4289D3 is a mid, vivid cyan. Relative luminance 0.238; OKLCH L 61.9% C 0.133 H 251.6°. Best body text is #000000 at 5.75:1 contrast (WCAG AA passes).

Color values

HEX	#4289D3
RGB	rgb(66, 137, 211)
HSL	hsl(211, 62%, 54%)
HSV	hsv(211, 69%, 83%)
CMYK	cmyk(68.7%, 35.1%, 0%, 17.3%)
CIE-LAB	lab(55.84, 1.69, -44.54)
CIE-LCH	lch(55.84, 44.57, 272.17°)
OKLab	oklab(61.9% -0.042 -0.1265)
OKLCH	oklch(61.9% 0.133 251.6)
XYZ	xyz(22.9459, 23.7503, 64.9904)
Luminance	0.2375 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4289D3 #D38C42

analogous

#42D1D3 #4289D3 #4442D3

triadic

#4289D3 #D34289 #89D342

tetradic

#4289D3 #D342D1 #D38C42 #42D344

square

#4289D3 #D342D1 #D38C42 #42D344

split-complementary

#4289D3 #D34442 #D1D342

monochromatic

#1D4C7D #296BAF #4289D3 #74A8DF #A5C7EA

Accessibility & contrast

On white

3.65

#4289D3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.75

#4289D3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4289D3

5.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4289D3	#FFFFFF	#000000	##000000
##4289D3	1.00	3.65	5.75	5.75
#FFFFFF	3.65	1.00	21.00	21.00
#000000	5.75	21.00	1.00	1.00
##000000	5.75	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#688DD6

Deuteranopia (green-blind)

#5380D2

Tritanopia (blue-blind)

#009AA4

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #4289d3;
/* rgb */ color: rgb(66, 137, 211);
/* oklch */ color: oklch(61.9% 0.133 251.6);

Tailwind

colors: {
  custom: {
    50: '#86abe1',
    500: '#4289d3',
    950: '#000000',
  },
}

SCSS

$custom: #4289d3;
$custom-light: #86abe1;
$custom-dark: #000000;

JSON

{
  "hex": "#4289d3",
  "rgb": {
    "r": 66,
    "g": 137,
    "b": 211
  },
  "hsl": {
    "h": 210.621,
    "s": 62.232,
    "l": 54.314
  },
  "oklch": {
    "l": 0.61895,
    "c": 0.13325,
    "h": 251.6
  },
  "luminance": 0.23753
}

Semantic roles & 50–950 ramp

primary

#4289D3

secondary

#D7B99A

accent

#9642E5

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #4289D3

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

Preview Lab → · Contrast checker → · Palette generator →