#428CBA#428CBA

#428CBA is a mid, moderate cyan. Relative luminance 0.235; OKLCH L 61.3% C 0.101 H 238.8°. Best body text is #000000 at 5.69:1 contrast (WCAG AA passes).

Color values

HEX	#428CBA
RGB	rgb(66, 140, 186)
HSL	hsl(203, 48%, 49%)
HSV	hsv(203, 65%, 73%)
CMYK	cmyk(64.5%, 24.7%, 0%, 27.1%)
CIE-LAB	lab(55.54, -8.59, -30.84)
CIE-LCH	lch(55.54, 32.02, 254.44°)
OKLab	oklab(61.28% -0.0525 -0.0866)
OKLCH	oklch(61.28% 0.101 238.8)
XYZ	xyz(20.4844, 23.4575, 49.8931)
Luminance	0.2346 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428CBA #BA7042

analogous

#42BAAC #428CBA #4250BA

triadic

#428CBA #BA428C #8CBA42

tetradic

#428CBA #AC42BA #BA7042 #50BA42

square

#428CBA #AC42BA #BA7042 #50BA42

split-complementary

#428CBA #BA4250 #BAAC42

monochromatic

#224860 #326A8D #428CBA #6EA8CB #9BC3DB

Accessibility & contrast

On white

3.69

#428CBA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.69

#428CBA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428CBA

5.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428CBA	#FFFFFF	#000000	##000000
##428CBA	1.00	3.69	5.69	5.69
#FFFFFF	3.69	1.00	21.00	21.00
#000000	5.69	21.00	1.00	1.00
##000000	5.69	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#778CBC

Deuteranopia (green-blind)

#6680B9

Tritanopia (blue-blind)

#00989C

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #428cba;
/* rgb */ color: rgb(66, 140, 186);
/* oklch */ color: oklch(61.3% 0.101 238.8);

Tailwind

colors: {
  custom: {
    50: '#82adcf',
    500: '#428cba',
    950: '#000000',
  },
}

SCSS

$custom: #428cba;
$custom-light: #82adcf;
$custom-dark: #000000;

JSON

{
  "hex": "#428cba",
  "rgb": {
    "r": 66,
    "g": 140,
    "b": 186
  },
  "hsl": {
    "h": 203,
    "s": 47.619,
    "l": 49.412
  },
  "oklch": {
    "l": 0.61277,
    "c": 0.10133,
    "h": 238.8
  },
  "luminance": 0.2346
}

Semantic roles & 50–950 ramp

primary

#428CBA

secondary

#C8A590

accent

#8451D7

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0C1013

muted

#7D7F82

Preview Lab

Preview with #428CBA

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

Preview Lab → · Contrast checker → · Palette generator →