#4288CC#4288CC

#4288CC is a mid, vivid cyan. Relative luminance 0.231; OKLCH L 61.3% C 0.125 H 250.0°. Best body text is #000000 at 5.63:1 contrast (WCAG AA passes).

Color values

HEX	#4288CC
RGB	rgb(66, 136, 204)
HSL	hsl(210, 58%, 53%)
HSV	hsv(210, 68%, 80%)
CMYK	cmyk(67.6%, 33.3%, 0%, 20%)
CIE-LAB	lab(55.20, -0.15, -41.59)
CIE-LCH	lch(55.20, 41.59, 269.79°)
OKLab	oklab(61.28% -0.0429 -0.1179)
OKLCH	oklch(61.28% 0.125 250)
XYZ	xyz(21.9460, 23.1239, 60.4218)
Luminance	0.2313 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4288CC #CC8642

analogous

#42CCCB #4288CC #4243CC

triadic

#4288CC #CC4288 #88CC42

tetradic

#4288CC #CB42CC #CC8642 #43CC42

square

#4288CC #CB42CC #CC8642 #43CC42

split-complementary

#4288CC #CC4243 #CCCB42

monochromatic

#1F4A74 #2C69A4 #4288CC #72A6D9 #A2C5E6

Accessibility & contrast

On white

3.73

#4288CC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.63

#4288CC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4288CC

5.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4288CC	#FFFFFF	#000000	##000000
##4288CC	1.00	3.73	5.63	5.63
#FFFFFF	3.73	1.00	21.00	21.00
#000000	5.63	21.00	1.00	1.00
##000000	5.63	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6A8BCF

Deuteranopia (green-blind)

#577ECB

Tritanopia (blue-blind)

#0098A1

Achromatopsia (no color)

#848484

Design tokens & code

CSS

--color: #4288cc;
/* rgb */ color: rgb(66, 136, 204);
/* oklch */ color: oklch(61.3% 0.125 250.0);

Tailwind

colors: {
  custom: {
    50: '#85aadc',
    500: '#4288cc',
    950: '#000000',
  },
}

SCSS

$custom: #4288cc;
$custom-light: #85aadc;
$custom-dark: #000000;

JSON

{
  "hex": "#4288cc",
  "rgb": {
    "r": 66,
    "g": 136,
    "b": 204
  },
  "hsl": {
    "h": 209.565,
    "s": 57.5,
    "l": 52.941
  },
  "oklch": {
    "l": 0.61281,
    "c": 0.12543,
    "h": 250
  },
  "luminance": 0.23126
}

Semantic roles & 50–950 ramp

primary

#4288CC

secondary

#D3B497

accent

#9347E1

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #4288CC

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

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