#4288B5#4288B5

#4288B5 is a mid, moderate cyan. Relative luminance 0.221; OKLCH L 60.1% C 0.098 H 239.5°. Best body text is #000000 at 5.42:1 contrast (WCAG AA passes).

Color values

HEX	#4288B5
RGB	rgb(66, 136, 181)
HSL	hsl(203, 47%, 48%)
HSV	hsv(203, 64%, 71%)
CMYK	cmyk(63.5%, 24.9%, 0%, 29%)
CIE-LAB	lab(54.13, -7.97, -30.18)
CIE-LCH	lch(54.13, 31.21, 255.21°)
OKLab	oklab(60.09% -0.05 -0.0848)
OKLCH	oklch(60.09% 0.098 239.5)
XYZ	xyz(19.3882, 22.1008, 46.9512)
Luminance	0.2210 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4288B5 #B56F42

analogous

#42B5A8 #4288B5 #424EB5

triadic

#4288B5 #B54288 #88B542

tetradic

#4288B5 #A842B5 #B56F42 #4EB542

square

#4288B5 #A842B5 #B56F42 #4EB542

split-complementary

#4288B5 #B5424E #B5A842

monochromatic

#21455B #326688 #4288B5 #6BA4C9 #98C0D9

Accessibility & contrast

On white

3.87

#4288B5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.42

#4288B5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4288B5

5.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4288B5	#FFFFFF	#000000	##000000
##4288B5	1.00	3.87	5.42	5.42
#FFFFFF	3.87	1.00	21.00	21.00
#000000	5.42	21.00	1.00	1.00
##000000	5.42	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7388B7

Deuteranopia (green-blind)

#647CB4

Tritanopia (blue-blind)

#009397

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #4288b5;
/* rgb */ color: rgb(66, 136, 181);
/* oklch */ color: oklch(60.1% 0.098 239.5);

Tailwind

colors: {
  custom: {
    50: '#82aacb',
    500: '#4288b5',
    950: '#000000',
  },
}

SCSS

$custom: #4288b5;
$custom-light: #82aacb;
$custom-dark: #000000;

JSON

{
  "hex": "#4288b5",
  "rgb": {
    "r": 66,
    "g": 136,
    "b": 181
  },
  "hsl": {
    "h": 203.478,
    "s": 46.559,
    "l": 48.431
  },
  "oklch": {
    "l": 0.6009,
    "c": 0.09838,
    "h": 239.5
  },
  "luminance": 0.22103
}

Semantic roles & 50–950 ramp

primary

#4288B5

secondary

#C5A38E

accent

#8552D6

background

#F8FAFC

surface

#F0F4F8

border

#CBCED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #4288B5

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

Preview Lab → · Contrast checker → · Palette generator →