#4288D5#4288D5

#4288D5 is a mid, vivid cyan. Relative luminance 0.236; OKLCH L 61.8% C 0.137 H 252.8°. Best body text is #000000 at 5.71:1 contrast (WCAG AA passes).

Color values

HEX	#4288D5
RGB	rgb(66, 136, 213)
HSL	hsl(211, 64%, 55%)
HSV	hsv(211, 69%, 84%)
CMYK	cmyk(69%, 36.2%, 0%, 16.5%)
CIE-LAB	lab(55.65, 2.99, -45.95)
CIE-LCH	lch(55.65, 46.05, 273.72°)
OKLab	oklab(61.79% -0.0405 -0.1306)
OKLCH	oklch(61.79% 0.137 252.8)
XYZ	xyz(23.0567, 23.5682, 66.2719)
Luminance	0.2357 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4288D5 #D58F42

analogous

#42D1D5 #4288D5 #4642D5

triadic

#4288D5 #D54288 #88D542

tetradic

#4288D5 #D542D1 #D58F42 #42D546

square

#4288D5 #D542D1 #D58F42 #42D546

split-complementary

#4288D5 #D54642 #D1D542

monochromatic

#1C4C80 #286AB2 #4288D5 #74A8E0 #A6C7EB

Accessibility & contrast

On white

3.68

#4288D5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.71

#4288D5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4288D5

5.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4288D5	#FFFFFF	#000000	##000000
##4288D5	1.00	3.68	5.71	5.71
#FFFFFF	3.68	1.00	21.00	21.00
#000000	5.71	21.00	1.00	1.00
##000000	5.71	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#658DD8

Deuteranopia (green-blind)

#507FD3

Tritanopia (blue-blind)

#009AA4

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #4288d5;
/* rgb */ color: rgb(66, 136, 213);
/* oklch */ color: oklch(61.8% 0.137 252.8);

Tailwind

colors: {
  custom: {
    50: '#86aae2',
    500: '#4288d5',
    950: '#000000',
  },
}

SCSS

$custom: #4288d5;
$custom-light: #86aae2;
$custom-dark: #000000;

JSON

{
  "hex": "#4288d5",
  "rgb": {
    "r": 66,
    "g": 136,
    "b": 213
  },
  "hsl": {
    "h": 211.429,
    "s": 63.636,
    "l": 54.706
  },
  "oklch": {
    "l": 0.61785,
    "c": 0.13675,
    "h": 252.8
  },
  "luminance": 0.23571
}

Semantic roles & 50–950 ramp

primary

#4288D5

secondary

#D8BB9A

accent

#9841E7

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #4288D5

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

Preview Lab → · Contrast checker → · Palette generator →