#4288CE#4288CE

#4288CE is a mid, vivid cyan. Relative luminance 0.232; OKLCH L 61.4% C 0.128 H 250.7°. Best body text is #000000 at 5.64:1 contrast (WCAG AA passes).

Color values

HEX	#4288CE
RGB	rgb(66, 136, 206)
HSL	hsl(210, 59%, 53%)
HSV	hsv(210, 68%, 81%)
CMYK	cmyk(68%, 34%, 0%, 19.2%)
CIE-LAB	lab(55.30, 0.54, -42.57)
CIE-LCH	lch(55.30, 42.57, 270.73°)
OKLab	oklab(61.39% -0.0423 -0.1207)
OKLCH	oklch(61.39% 0.128 250.7)
XYZ	xyz(22.1874, 23.2205, 61.6932)
Luminance	0.2322 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4288CE #CE8842

analogous

#42CECE #4288CE #4242CE

triadic

#4288CE #CE4288 #88CE42

tetradic

#4288CE #CE42CE #CE8842 #42CE42

square

#4288CE #CE42CE #CE8842 #42CE42

split-complementary

#4288CE #CE4242 #CECE42

monochromatic

#1F4B77 #2B69A7 #4288CE #73A7DB #A3C5E7

Accessibility & contrast

On white

3.72

#4288CE on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.64

#4288CE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4288CE

5.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4288CE	#FFFFFF	#000000	##000000
##4288CE	1.00	3.72	5.64	5.64
#FFFFFF	3.72	1.00	21.00	21.00
#000000	5.64	21.00	1.00	1.00
##000000	5.64	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#698CD1

Deuteranopia (green-blind)

#557ECD

Tritanopia (blue-blind)

#0098A1

Achromatopsia (no color)

#848484

Design tokens & code

CSS

--color: #4288ce;
/* rgb */ color: rgb(66, 136, 206);
/* oklch */ color: oklch(61.4% 0.128 250.7);

Tailwind

colors: {
  custom: {
    50: '#85aadd',
    500: '#4288ce',
    950: '#000000',
  },
}

SCSS

$custom: #4288ce;
$custom-light: #85aadd;
$custom-dark: #000000;

JSON

{
  "hex": "#4288ce",
  "rgb": {
    "r": 66,
    "g": 136,
    "b": 206
  },
  "hsl": {
    "h": 210,
    "s": 58.824,
    "l": 53.333
  },
  "oklch": {
    "l": 0.61391,
    "c": 0.12793,
    "h": 250.7
  },
  "luminance": 0.23223
}

Semantic roles & 50–950 ramp

primary

#4288CE

secondary

#D4B698

accent

#9446E2

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #4288CE

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

Preview Lab → · Contrast checker → · Palette generator →