#4288D3#4288D3

#4288D3 is a mid, vivid cyan. Relative luminance 0.235; OKLCH L 61.7% C 0.134 H 252.2°. Best body text is #000000 at 5.69:1 contrast (WCAG AA passes).

Color values

HEX	#4288D3
RGB	rgb(66, 136, 211)
HSL	hsl(211, 62%, 54%)
HSV	hsv(211, 69%, 83%)
CMYK	cmyk(68.7%, 35.5%, 0%, 17.3%)
CIE-LAB	lab(55.55, 2.28, -44.99)
CIE-LCH	lch(55.55, 45.05, 272.91°)
OKLab	oklab(61.67% -0.041 -0.1278)
OKLCH	oklch(61.67% 0.134 252.2)
XYZ	xyz(22.8044, 23.4673, 64.9432)
Luminance	0.2347 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4288D3 #D38D42

analogous

#42D1D3 #4288D3 #4442D3

triadic

#4288D3 #D34288 #88D342

tetradic

#4288D3 #D342D1 #D38D42 #42D344

square

#4288D3 #D342D1 #D38D42 #42D344

split-complementary

#4288D3 #D34442 #D1D342

monochromatic

#1D4C7D #296AAF #4288D3 #74A7DF #A5C7EA

Accessibility & contrast

On white

3.69

#4288D3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.69

#4288D3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4288D3

5.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4288D3	#FFFFFF	#000000	##000000
##4288D3	1.00	3.69	5.69	5.69
#FFFFFF	3.69	1.00	21.00	21.00
#000000	5.69	21.00	1.00	1.00
##000000	5.69	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#668DD6

Deuteranopia (green-blind)

#527FD2

Tritanopia (blue-blind)

#009AA3

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #4288d3;
/* rgb */ color: rgb(66, 136, 211);
/* oklch */ color: oklch(61.7% 0.134 252.2);

Tailwind

colors: {
  custom: {
    50: '#86aae1',
    500: '#4288d3',
    950: '#000000',
  },
}

SCSS

$custom: #4288d3;
$custom-light: #86aae1;
$custom-dark: #000000;

JSON

{
  "hex": "#4288d3",
  "rgb": {
    "r": 66,
    "g": 136,
    "b": 211
  },
  "hsl": {
    "h": 211.034,
    "s": 62.232,
    "l": 54.314
  },
  "oklch": {
    "l": 0.61671,
    "c": 0.13421,
    "h": 252.2
  },
  "luminance": 0.2347
}

Semantic roles & 50–950 ramp

primary

#4288D3

secondary

#D7B99A

accent

#9742E5

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #4288D3

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

Preview Lab → · Contrast checker → · Palette generator →