#4289DB#4289DB

#4289DB is a light, vivid cyan. Relative luminance 0.242; OKLCH L 62.4% C 0.143 H 253.8°. Best body text is #000000 at 5.83:1 contrast (WCAG AA passes).

Color values

HEX	#4289DB
RGB	rgb(66, 137, 219)
HSL	hsl(212, 68%, 56%)
HSV	hsv(212, 70%, 86%)
CMYK	cmyk(69.9%, 37.4%, 0%, 14.1%)
CIE-LAB	lab(56.25, 4.50, -48.38)
CIE-LCH	lch(56.25, 48.59, 275.31°)
OKLab	oklab(62.35% -0.0399 -0.1377)
OKLCH	oklch(62.35% 0.143 253.8)
XYZ	xyz(23.9739, 24.1615, 70.4043)
Luminance	0.2416 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4289DB #DB9442

analogous

#42D5DB #4289DB #4742DB

triadic

#4289DB #DB4289 #89DB42

tetradic

#4289DB #DB42D5 #DB9442 #42DB47

square

#4289DB #DB42D5 #DB9442 #42DB47

split-complementary

#4289DB #DB4742 #D5DB42

monochromatic

#1A4D89 #246ABC #4289DB #75A9E5 #A9C9EF

Accessibility & contrast

On white

3.60

#4289DB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.83

#4289DB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4289DB

5.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4289DB	#FFFFFF	#000000	##000000
##4289DB	1.00	3.60	5.83	5.83
#FFFFFF	3.60	1.00	21.00	21.00
#000000	5.83	21.00	1.00	1.00
##000000	5.83	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#648FDE

Deuteranopia (green-blind)

#4D80D9

Tritanopia (blue-blind)

#009CA7

Achromatopsia (no color)

#878787

Design tokens & code

CSS

--color: #4289db;
/* rgb */ color: rgb(66, 137, 219);
/* oklch */ color: oklch(62.4% 0.143 253.8);

Tailwind

colors: {
  custom: {
    50: '#87abe6',
    500: '#4289db',
    950: '#000000',
  },
}

SCSS

$custom: #4289db;
$custom-light: #87abe6;
$custom-dark: #000000;

JSON

{
  "hex": "#4289db",
  "rgb": {
    "r": 66,
    "g": 137,
    "b": 219
  },
  "hsl": {
    "h": 212.157,
    "s": 68,
    "l": 55.882
  },
  "oklch": {
    "l": 0.62352,
    "c": 0.14339,
    "h": 253.8
  },
  "luminance": 0.24164
}

Semantic roles & 50–950 ramp

primary

#4289DB

secondary

#DCBF9D

accent

#9A3DEB

background

#F9FAFE

surface

#F1F4FC

border

#CBCED5

text

#0D1016

muted

#7E7F84

Preview Lab

Preview with #4289DB

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

Preview Lab → · Contrast checker → · Palette generator →