#4288CF#4288CF

#4288CF is a mid, vivid cyan. Relative luminance 0.233; OKLCH L 61.4% C 0.129 H 251.0°. Best body text is #000000 at 5.65:1 contrast (WCAG AA passes).

Color values

HEX	#4288CF
RGB	rgb(66, 136, 207)
HSL	hsl(210, 59%, 54%)
HSV	hsv(210, 68%, 81%)
CMYK	cmyk(68.1%, 34.3%, 0%, 18.8%)
CIE-LAB	lab(55.35, 0.89, -43.05)
CIE-LCH	lch(55.35, 43.06, 271.18°)
OKLab	oklab(61.45% -0.042 -0.1221)
OKLCH	oklch(61.45% 0.129 251)
XYZ	xyz(22.3092, 23.2692, 62.3351)
Luminance	0.2327 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4288CF #CF8942

analogous

#42CECF #4288CF #4242CF

triadic

#4288CF #CF4288 #88CF42

tetradic

#4288CF #CF42CE #CF8942 #42CF42

square

#4288CF #CF42CE #CF8942 #42CF42

split-complementary

#4288CF #CF4242 #CECF42

monochromatic

#1F4B78 #2B69A9 #4288CF #73A7DB #A4C5E8

Accessibility & contrast

On white

3.71

#4288CF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.65

#4288CF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4288CF

5.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4288CF	#FFFFFF	#000000	##000000
##4288CF	1.00	3.71	5.65	5.65
#FFFFFF	3.71	1.00	21.00	21.00
#000000	5.65	21.00	1.00	1.00
##000000	5.65	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#688CD2

Deuteranopia (green-blind)

#547ECE

Tritanopia (blue-blind)

#0099A2

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #4288cf;
/* rgb */ color: rgb(66, 136, 207);
/* oklch */ color: oklch(61.4% 0.129 251.0);

Tailwind

colors: {
  custom: {
    50: '#85aade',
    500: '#4288cf',
    950: '#000000',
  },
}

SCSS

$custom: #4288cf;
$custom-light: #85aade;
$custom-dark: #000000;

JSON

{
  "hex": "#4288cf",
  "rgb": {
    "r": 66,
    "g": 136,
    "b": 207
  },
  "hsl": {
    "h": 210.213,
    "s": 59.494,
    "l": 53.529
  },
  "oklch": {
    "l": 0.61447,
    "c": 0.12919,
    "h": 251
  },
  "luminance": 0.23272
}

Semantic roles & 50–950 ramp

primary

#4288CF

secondary

#D5B798

accent

#9445E3

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #4288CF

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

Preview Lab → · Contrast checker → · Palette generator →