#4288DB#4288DB

#4288DB is a light, vivid cyan. Relative luminance 0.239; OKLCH L 62.1% C 0.144 H 254.3°. Best body text is #000000 at 5.78:1 contrast (WCAG AA passes).

Color values

HEX	#4288DB
RGB	rgb(66, 136, 219)
HSL	hsl(213, 68%, 56%)
HSV	hsv(213, 70%, 86%)
CMYK	cmyk(69.9%, 37.9%, 0%, 14.1%)
CIE-LAB	lab(55.97, 5.09, -48.83)
CIE-LCH	lch(55.97, 49.09, 275.96°)
OKLab	oklab(62.13% -0.039 -0.139)
OKLCH	oklch(62.13% 0.144 254.3)
XYZ	xyz(23.8324, 23.8785, 70.3571)
Luminance	0.2388 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4288DB #DB9542

analogous

#42D4DB #4288DB #4842DB

triadic

#4288DB #DB4288 #88DB42

tetradic

#4288DB #DB42D4 #DB9542 #42DB48

square

#4288DB #DB42D4 #DB9542 #42DB48

split-complementary

#4288DB #DB4842 #D4DB42

monochromatic

#1A4D89 #2469BC #4288DB #75A8E5 #A9C9EF

Accessibility & contrast

On white

3.64

#4288DB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.78

#4288DB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4288DB

5.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4288DB	#FFFFFF	#000000	##000000
##4288DB	1.00	3.64	5.78	5.78
#FFFFFF	3.64	1.00	21.00	21.00
#000000	5.78	21.00	1.00	1.00
##000000	5.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#628EDE

Deuteranopia (green-blind)

#4B80D9

Tritanopia (blue-blind)

#009BA7

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #4288db;
/* rgb */ color: rgb(66, 136, 219);
/* oklch */ color: oklch(62.1% 0.144 254.3);

Tailwind

colors: {
  custom: {
    50: '#87aae6',
    500: '#4288db',
    950: '#000000',
  },
}

SCSS

$custom: #4288db;
$custom-light: #87aae6;
$custom-dark: #000000;

JSON

{
  "hex": "#4288db",
  "rgb": {
    "r": 66,
    "g": 136,
    "b": 219
  },
  "hsl": {
    "h": 212.549,
    "s": 68,
    "l": 55.882
  },
  "oklch": {
    "l": 0.62131,
    "c": 0.14441,
    "h": 254.3
  },
  "luminance": 0.23881
}

Semantic roles & 50–950 ramp

primary

#4288DB

secondary

#DCBF9D

accent

#9B3DEB

background

#F9FAFE

surface

#F1F4FC

border

#CBCED5

text

#0D0F16

muted

#7E7F84

Preview Lab

Preview with #4288DB

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

Preview Lab → · Contrast checker → · Palette generator →