#428DB5#428DB5

#428DB5 is a mid, moderate cyan. Relative luminance 0.235; OKLCH L 61.3% C 0.096 H 234.7°. Best body text is #000000 at 5.71:1 contrast (WCAG AA passes).

Color values

HEX	#428DB5
RGB	rgb(66, 141, 181)
HSL	hsl(201, 47%, 48%)
HSV	hsv(201, 64%, 71%)
CMYK	cmyk(63.5%, 22.1%, 0%, 29%)
CIE-LAB	lab(55.63, -10.80, -27.86)
CIE-LCH	lch(55.63, 29.88, 248.81°)
OKLab	oklab(61.28% -0.0554 -0.0781)
OKLCH	oklch(61.28% 0.096 234.7)
XYZ	xyz(20.1089, 23.5422, 47.1914)
Luminance	0.2354 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428DB5 #B56A42

analogous

#42B5A3 #428DB5 #4253B5

triadic

#428DB5 #B5428D #8DB542

tetradic

#428DB5 #A342B5 #B56A42 #53B542

square

#428DB5 #A342B5 #B56A42 #53B542

split-complementary

#428DB5 #B54253 #B5A342

monochromatic

#21475B #326A88 #428DB5 #6BA8C9 #98C3D9

Accessibility & contrast

On white

3.68

#428DB5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.71

#428DB5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428DB5

5.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428DB5	#FFFFFF	#000000	##000000
##428DB5	1.00	3.68	5.71	5.71
#FFFFFF	3.68	1.00	21.00	21.00
#000000	5.71	21.00	1.00	1.00
##000000	5.71	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7A8CB7

Deuteranopia (green-blind)

#6A80B4

Tritanopia (blue-blind)

#00989A

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #428db5;
/* rgb */ color: rgb(66, 141, 181);
/* oklch */ color: oklch(61.3% 0.096 234.7);

Tailwind

colors: {
  custom: {
    50: '#82aecb',
    500: '#428db5',
    950: '#000000',
  },
}

SCSS

$custom: #428db5;
$custom-light: #82aecb;
$custom-dark: #000000;

JSON

{
  "hex": "#428db5",
  "rgb": {
    "r": 66,
    "g": 141,
    "b": 181
  },
  "hsl": {
    "h": 200.87,
    "s": 46.559,
    "l": 48.431
  },
  "oklch": {
    "l": 0.61275,
    "c": 0.0957,
    "h": 234.7
  },
  "luminance": 0.23544
}

Semantic roles & 50–950 ramp

primary

#428DB5

secondary

#C5A18E

accent

#8052D6

background

#F8FAFC

surface

#F0F4F8

border

#CBCED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #428DB5

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

Preview Lab → · Contrast checker → · Palette generator →