#428BC1#428BC1

#428BC1 is a mid, moderate cyan. Relative luminance 0.235; OKLCH L 61.4% C 0.110 H 243.4°. Best body text is #000000 at 5.69:1 contrast (WCAG AA passes).

Color values

HEX	#428BC1
RGB	rgb(66, 139, 193)
HSL	hsl(206, 51%, 51%)
HSV	hsv(206, 66%, 76%)
CMYK	cmyk(65.8%, 28%, 0%, 24.3%)
CIE-LAB	lab(55.55, -5.67, -34.80)
CIE-LCH	lch(55.55, 35.26, 260.75°)
OKLab	oklab(61.39% -0.0492 -0.0981)
OKLCH	oklch(61.39% 0.11 243.4)
XYZ	xyz(21.1014, 23.4716, 53.8601)
Luminance	0.2347 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428BC1 #C17842

analogous

#42C1B8 #428BC1 #424BC1

triadic

#428BC1 #C1428B #8BC142

tetradic

#428BC1 #B842C1 #C17842 #4BC142

square

#428BC1 #B842C1 #C17842 #4BC142

split-complementary

#428BC1 #C1424B #C1B842

monochromatic

#224967 #316A95 #428BC1 #70A7D0 #9EC4DF

Accessibility & contrast

On white

3.69

#428BC1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.69

#428BC1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428BC1

5.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428BC1	#FFFFFF	#000000	##000000
##428BC1	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)

#738CC3

Deuteranopia (green-blind)

#6180C0

Tritanopia (blue-blind)

#00989E

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #428bc1;
/* rgb */ color: rgb(66, 139, 193);
/* oklch */ color: oklch(61.4% 0.110 243.4);

Tailwind

colors: {
  custom: {
    50: '#83acd4',
    500: '#428bc1',
    950: '#000000',
  },
}

SCSS

$custom: #428bc1;
$custom-light: #83acd4;
$custom-dark: #000000;

JSON

{
  "hex": "#428bc1",
  "rgb": {
    "r": 66,
    "g": 139,
    "b": 193
  },
  "hsl": {
    "h": 205.512,
    "s": 50.598,
    "l": 50.784
  },
  "oklch": {
    "l": 0.6139,
    "c": 0.10974,
    "h": 243.4
  },
  "luminance": 0.23474
}

Semantic roles & 50–950 ramp

primary

#428BC1

secondary

#CCAB93

accent

#894EDA

background

#F8FAFD

surface

#F0F4FA

border

#CBCED3

text

#0C1014

muted

#7D7F83

Preview Lab

Preview with #428BC1

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

Preview Lab → · Contrast checker → · Palette generator →