#4288B2#4288B2

#4288B2 is a mid, moderate cyan. Relative luminance 0.220; OKLCH L 59.9% C 0.095 H 237.6°. Best body text is #000000 at 5.40:1 contrast (WCAG AA passes).

Color values

HEX	#4288B2
RGB	rgb(66, 136, 178)
HSL	hsl(203, 46%, 48%)
HSV	hsv(203, 63%, 70%)
CMYK	cmyk(62.9%, 23.6%, 0%, 30.2%)
CIE-LAB	lab(54.00, -8.96, -28.66)
CIE-LCH	lch(54.00, 30.03, 252.64°)
OKLab	oklab(59.95% -0.051 -0.0804)
OKLCH	oklch(59.95% 0.095 237.6)
XYZ	xyz(19.0837, 21.9790, 45.3475)
Luminance	0.2198 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4288B2 #B26C42

analogous

#42B2A4 #4288B2 #4250B2

triadic

#4288B2 #B24288 #88B242

tetradic

#4288B2 #A442B2 #B26C42 #50B242

square

#4288B2 #A442B2 #B26C42 #50B242

split-complementary

#4288B2 #B24250 #B2A442

monochromatic

#214459 #316685 #4288B2 #6AA4C8 #96BFD8

Accessibility & contrast

On white

3.89

#4288B2 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.40

#4288B2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4288B2

5.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4288B2	#FFFFFF	#000000	##000000
##4288B2	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)

#7487B4

Deuteranopia (green-blind)

#657CB1

Tritanopia (blue-blind)

#009396

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #4288b2;
/* rgb */ color: rgb(66, 136, 178);
/* oklch */ color: oklch(59.9% 0.095 237.6);

Tailwind

colors: {
  custom: {
    50: '#81aac9',
    500: '#4288b2',
    950: '#000000',
  },
}

SCSS

$custom: #4288b2;
$custom-light: #81aac9;
$custom-dark: #000000;

JSON

{
  "hex": "#4288b2",
  "rgb": {
    "r": 66,
    "g": 136,
    "b": 178
  },
  "hsl": {
    "h": 202.5,
    "s": 45.902,
    "l": 47.843
  },
  "oklch": {
    "l": 0.59945,
    "c": 0.09519,
    "h": 237.6
  },
  "luminance": 0.21981
}

Semantic roles & 50–950 ramp

primary

#4288B2

secondary

#C4A18C

accent

#8352D6

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #4288B2

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

Preview Lab → · Contrast checker → · Palette generator →