#4289E3#4289E3

#4289E3 is a light, vivid cyan. Relative luminance 0.246; OKLCH L 62.8% C 0.154 H 255.6°. Best body text is #000000 at 5.92:1 contrast (WCAG AA passes).

Color values

HEX	#4289E3
RGB	rgb(66, 137, 227)
HSL	hsl(214, 74%, 57%)
HSV	hsv(214, 71%, 89%)
CMYK	cmyk(70.9%, 39.6%, 0%, 11%)
CIE-LAB	lab(56.68, 7.32, -52.17)
CIE-LCH	lch(56.68, 52.68, 277.99°)
OKLab	oklab(62.82% -0.0381 -0.1488)
OKLCH	oklch(62.82% 0.154 255.6)
XYZ	xyz(25.0525, 24.5929, 76.0847)
Luminance	0.2460 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4289E3 #E39C42

analogous

#42DAE3 #4289E3 #4B42E3

triadic

#4289E3 #E34289 #89E342

tetradic

#4289E3 #E342DA #E39C42 #42E34B

square

#4289E3 #E342DA #E39C42 #42E34B

split-complementary

#4289E3 #E34B42 #DAE342

monochromatic

#164E95 #1E6ACA #4289E3 #77AAEB #ADCCF3

Accessibility & contrast

On white

3.55

#4289E3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.92

#4289E3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4289E3

5.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4289E3	#FFFFFF	#000000	##000000
##4289E3	1.00	3.55	5.92	5.92
#FFFFFF	3.55	1.00	21.00	21.00
#000000	5.92	21.00	1.00	1.00
##000000	5.92	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5F90E7

Deuteranopia (green-blind)

#4581E1

Tritanopia (blue-blind)

#009EAB

Achromatopsia (no color)

#888888

Design tokens & code

CSS

--color: #4289e3;
/* rgb */ color: rgb(66, 137, 227);
/* oklch */ color: oklch(62.8% 0.154 255.6);

Tailwind

colors: {
  custom: {
    50: '#89aaec',
    500: '#4289e3',
    950: '#000000',
  },
}

SCSS

$custom: #4289e3;
$custom-light: #89aaec;
$custom-dark: #000000;

JSON

{
  "hex": "#4289e3",
  "rgb": {
    "r": 66,
    "g": 137,
    "b": 227
  },
  "hsl": {
    "h": 213.54,
    "s": 74.194,
    "l": 57.451
  },
  "oklch": {
    "l": 0.62824,
    "c": 0.15363,
    "h": 255.6
  },
  "luminance": 0.24596
}

Semantic roles & 50–950 ramp

primary

#4289E3

secondary

#E1C4A0

accent

#9F37F1

background

#F9FAFE

surface

#F1F4FD

border

#CBCED5

text

#0D1016

muted

#7E7F84

Preview Lab

Preview with #4289E3

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

Preview Lab → · Contrast checker → · Palette generator →