#4288B3#4288B3

#4288B3 is a mid, moderate cyan. Relative luminance 0.220; OKLCH L 60.0% C 0.096 H 238.3°. Best body text is #000000 at 5.40:1 contrast (WCAG AA passes).

Color values

HEX	#4288B3
RGB	rgb(66, 136, 179)
HSL	hsl(203, 46%, 48%)
HSV	hsv(203, 63%, 70%)
CMYK	cmyk(63.1%, 24%, 0%, 29.8%)
CIE-LAB	lab(54.05, -8.63, -29.17)
CIE-LCH	lch(54.05, 30.42, 253.51°)
OKLab	oklab(59.99% -0.0506 -0.0818)
OKLCH	oklch(59.99% 0.096 238.3)
XYZ	xyz(19.1845, 22.0193, 45.8782)
Luminance	0.2202 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4288B3 #B36D42

analogous

#42B3A5 #4288B3 #424FB3

triadic

#4288B3 #B34288 #88B342

tetradic

#4288B3 #A542B3 #B36D42 #4FB342

square

#4288B3 #A542B3 #B36D42 #4FB342

split-complementary

#4288B3 #B3424F #B3A542

monochromatic

#21445A #326686 #4288B3 #6AA4C8 #97C0D9

Accessibility & contrast

On white

3.89

#4288B3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.40

#4288B3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4288B3

5.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4288B3	#FFFFFF	#000000	##000000
##4288B3	1.00	3.89	5.40	5.40
#FFFFFF	3.89	1.00	21.00	21.00
#000000	5.40	21.00	1.00	1.00
##000000	5.40	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7488B5

Deuteranopia (green-blind)

#657CB2

Tritanopia (blue-blind)

#009397

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #4288b3;
/* rgb */ color: rgb(66, 136, 179);
/* oklch */ color: oklch(60.0% 0.096 238.3);

Tailwind

colors: {
  custom: {
    50: '#81aaca',
    500: '#4288b3',
    950: '#000000',
  },
}

SCSS

$custom: #4288b3;
$custom-light: #81aaca;
$custom-dark: #000000;

JSON

{
  "hex": "#4288b3",
  "rgb": {
    "r": 66,
    "g": 136,
    "b": 179
  },
  "hsl": {
    "h": 202.832,
    "s": 46.122,
    "l": 48.039
  },
  "oklch": {
    "l": 0.59993,
    "c": 0.09624,
    "h": 238.3
  },
  "luminance": 0.22021
}

Semantic roles & 50–950 ramp

primary

#4288B3

secondary

#C4A28C

accent

#8452D6

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #4288B3

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

Preview Lab → · Contrast checker → · Palette generator →