#4289E0#4289E0

#4289E0 is a light, vivid cyan. Relative luminance 0.244; OKLCH L 62.6% C 0.150 H 255.0°. Best body text is #000000 at 5.89:1 contrast (WCAG AA passes).

Color values

HEX	#4289E0
RGB	rgb(66, 137, 224)
HSL	hsl(213, 72%, 57%)
HSV	hsv(213, 71%, 88%)
CMYK	cmyk(70.5%, 38.8%, 0%, 12.2%)
CIE-LAB	lab(56.51, 6.26, -50.76)
CIE-LCH	lch(56.51, 51.14, 277.03°)
OKLab	oklab(62.65% -0.0388 -0.1447)
OKLCH	oklch(62.65% 0.15 255)
XYZ	xyz(24.6420, 24.4287, 73.9231)
Luminance	0.2443 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4289E0 #E09942

analogous

#42D8E0 #4289E0 #4A42E0

triadic

#4289E0 #E04289 #89E042

tetradic

#4289E0 #E042D8 #E09942 #42E04A

square

#4289E0 #E042D8 #E09942 #42E04A

split-complementary

#4289E0 #E04A42 #D8E042

monochromatic

#184E90 #206AC5 #4289E0 #77AAE9 #ABCBF1

Accessibility & contrast

On white

3.57

#4289E0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.89

#4289E0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4289E0

5.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4289E0	#FFFFFF	#000000	##000000
##4289E0	1.00	3.57	5.89	5.89
#FFFFFF	3.57	1.00	21.00	21.00
#000000	5.89	21.00	1.00	1.00
##000000	5.89	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6190E3

Deuteranopia (green-blind)

#4881DE

Tritanopia (blue-blind)

#009DAA

Achromatopsia (no color)

#888888

Design tokens & code

CSS

--color: #4289e0;
/* rgb */ color: rgb(66, 137, 224);
/* oklch */ color: oklch(62.6% 0.150 255.0);

Tailwind

colors: {
  custom: {
    50: '#88aaea',
    500: '#4289e0',
    950: '#000000',
  },
}

SCSS

$custom: #4289e0;
$custom-light: #88aaea;
$custom-dark: #000000;

JSON

{
  "hex": "#4289e0",
  "rgb": {
    "r": 66,
    "g": 137,
    "b": 224
  },
  "hsl": {
    "h": 213.038,
    "s": 71.818,
    "l": 56.863
  },
  "oklch": {
    "l": 0.62645,
    "c": 0.14978,
    "h": 255
  },
  "luminance": 0.24431
}

Semantic roles & 50–950 ramp

primary

#4289E0

secondary

#DFC29F

accent

#9D39EF

background

#F9FAFE

surface

#F1F4FD

border

#CBCED5

text

#0D1016

muted

#7E7F84

Preview Lab

Preview with #4289E0

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

Preview Lab → · Contrast checker → · Palette generator →