#4289DC#4289DC

#4289DC is a light, vivid cyan. Relative luminance 0.242; OKLCH L 62.4% C 0.145 H 254.1°. Best body text is #000000 at 5.84:1 contrast (WCAG AA passes).

Color values

HEX	#4289DC
RGB	rgb(66, 137, 220)
HSL	hsl(212, 69%, 56%)
HSV	hsv(212, 70%, 86%)
CMYK	cmyk(70%, 37.7%, 0%, 13.7%)
CIE-LAB	lab(56.30, 4.85, -48.86)
CIE-LCH	lch(56.30, 49.10, 275.67°)
OKLab	oklab(62.41% -0.0397 -0.1391)
OKLCH	oklch(62.41% 0.145 254.1)
XYZ	xyz(24.1059, 24.2143, 71.0997)
Luminance	0.2422 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4289DC #DC9542

analogous

#42D6DC #4289DC #4842DC

triadic

#4289DC #DC4289 #89DC42

tetradic

#4289DC #DC42D6 #DC9542 #42DC48

square

#4289DC #DC42D6 #DC9542 #42DC48

split-complementary

#4289DC #DC4842 #D6DC42

monochromatic

#1A4D8A #236ABE #4289DC #76A9E6 #A9C9EF

Accessibility & contrast

On white

3.59

#4289DC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.84

#4289DC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4289DC

5.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4289DC	#FFFFFF	#000000	##000000
##4289DC	1.00	3.59	5.84	5.84
#FFFFFF	3.59	1.00	21.00	21.00
#000000	5.84	21.00	1.00	1.00
##000000	5.84	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#638FDF

Deuteranopia (green-blind)

#4C80DA

Tritanopia (blue-blind)

#009CA8

Achromatopsia (no color)

#878787

Design tokens & code

CSS

--color: #4289dc;
/* rgb */ color: rgb(66, 137, 220);
/* oklch */ color: oklch(62.4% 0.145 254.1);

Tailwind

colors: {
  custom: {
    50: '#88abe7',
    500: '#4289dc',
    950: '#000000',
  },
}

SCSS

$custom: #4289dc;
$custom-light: #88abe7;
$custom-dark: #000000;

JSON

{
  "hex": "#4289dc",
  "rgb": {
    "r": 66,
    "g": 137,
    "b": 220
  },
  "hsl": {
    "h": 212.338,
    "s": 68.75,
    "l": 56.078
  },
  "oklch": {
    "l": 0.6241,
    "c": 0.14466,
    "h": 254.1
  },
  "luminance": 0.24217
}

Semantic roles & 50–950 ramp

primary

#4289DC

secondary

#DDBF9D

accent

#9B3CEC

background

#F9FAFE

surface

#F1F4FC

border

#CBCED5

text

#0D1016

muted

#7E7F84

Preview Lab

Preview with #4289DC

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

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