#4288DD#4288DD

#4288DD is a light, vivid cyan. Relative luminance 0.240; OKLCH L 62.2% C 0.147 H 254.8°. Best body text is #000000 at 5.80:1 contrast (WCAG AA passes).

Color values

HEX	#4288DD
RGB	rgb(66, 136, 221)
HSL	hsl(213, 70%, 56%)
HSV	hsv(213, 70%, 87%)
CMYK	cmyk(70.1%, 38.5%, 0%, 13.3%)
CIE-LAB	lab(56.07, 5.80, -49.78)
CIE-LCH	lch(56.07, 50.12, 276.65°)
OKLab	oklab(62.25% -0.0385 -0.1418)
OKLCH	oklch(62.25% 0.147 254.8)
XYZ	xyz(24.0973, 23.9844, 71.7521)
Luminance	0.2399 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4288DD #DD9742

analogous

#42D6DD #4288DD #4A42DD

triadic

#4288DD #DD4288 #88DD42

tetradic

#4288DD #DD42D6 #DD9742 #42DD4A

square

#4288DD #DD42D6 #DD9742 #42DD4A

split-complementary

#4288DD #DD4A42 #D6DD42

monochromatic

#194D8C #2269BF #4288DD #76A9E6 #AAC9F0

Accessibility & contrast

On white

3.62

#4288DD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.80

#4288DD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4288DD

5.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4288DD	#FFFFFF	#000000	##000000
##4288DD	1.00	3.62	5.80	5.80
#FFFFFF	3.62	1.00	21.00	21.00
#000000	5.80	21.00	1.00	1.00
##000000	5.80	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#618EE0

Deuteranopia (green-blind)

#4980DB

Tritanopia (blue-blind)

#009CA8

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #4288dd;
/* rgb */ color: rgb(66, 136, 221);
/* oklch */ color: oklch(62.2% 0.147 254.8);

Tailwind

colors: {
  custom: {
    50: '#88aae8',
    500: '#4288dd',
    950: '#000000',
  },
}

SCSS

$custom: #4288dd;
$custom-light: #88aae8;
$custom-dark: #000000;

JSON

{
  "hex": "#4288dd",
  "rgb": {
    "r": 66,
    "g": 136,
    "b": 221
  },
  "hsl": {
    "h": 212.903,
    "s": 69.507,
    "l": 56.275
  },
  "oklch": {
    "l": 0.62249,
    "c": 0.14698,
    "h": 254.8
  },
  "luminance": 0.23987
}

Semantic roles & 50–950 ramp

primary

#4288DD

secondary

#DDC09D

accent

#9C3BEC

background

#F9FAFE

surface

#F1F4FC

border

#CBCED5

text

#0D0F16

muted

#7E7F84

Preview Lab

Preview with #4288DD

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

Preview Lab → · Contrast checker → · Palette generator →