#428DBA#428DBA

#428DBA is a mid, moderate cyan. Relative luminance 0.238; OKLCH L 61.5% C 0.101 H 237.9°. Best body text is #000000 at 5.75:1 contrast (WCAG AA passes).

Color values

HEX	#428DBA
RGB	rgb(66, 141, 186)
HSL	hsl(203, 48%, 49%)
HSV	hsv(203, 65%, 73%)
CMYK	cmyk(64.5%, 24.2%, 0%, 27.1%)
CIE-LAB	lab(55.84, -9.15, -30.38)
CIE-LCH	lch(55.84, 31.73, 253.23°)
OKLab	oklab(61.51% -0.0536 -0.0853)
OKLCH	oklch(61.51% 0.101 237.9)
XYZ	xyz(20.6312, 23.7511, 49.9420)
Luminance	0.2375 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428DBA #BA6F42

analogous

#42BAAB #428DBA #4251BA

triadic

#428DBA #BA428D #8DBA42

tetradic

#428DBA #AB42BA #BA6F42 #51BA42

square

#428DBA #AB42BA #BA6F42 #51BA42

split-complementary

#428DBA #BA4251 #BAAB42

monochromatic

#224960 #326B8D #428DBA #6EA8CB #9BC3DB

Accessibility & contrast

On white

3.65

#428DBA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.75

#428DBA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428DBA

5.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428DBA	#FFFFFF	#000000	##000000
##428DBA	1.00	3.65	5.75	5.75
#FFFFFF	3.65	1.00	21.00	21.00
#000000	5.75	21.00	1.00	1.00
##000000	5.75	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#788DBC

Deuteranopia (green-blind)

#6880B9

Tritanopia (blue-blind)

#00989C

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #428dba;
/* rgb */ color: rgb(66, 141, 186);
/* oklch */ color: oklch(61.5% 0.101 237.9);

Tailwind

colors: {
  custom: {
    50: '#82aecf',
    500: '#428dba',
    950: '#000000',
  },
}

SCSS

$custom: #428dba;
$custom-light: #82aecf;
$custom-dark: #000000;

JSON

{
  "hex": "#428dba",
  "rgb": {
    "r": 66,
    "g": 141,
    "b": 186
  },
  "hsl": {
    "h": 202.5,
    "s": 47.619,
    "l": 49.412
  },
  "oklch": {
    "l": 0.61513,
    "c": 0.10076,
    "h": 237.9
  },
  "luminance": 0.23753
}

Semantic roles & 50–950 ramp

primary

#428DBA

secondary

#C8A590

accent

#8351D7

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0C1013

muted

#7D7F82

Preview Lab

Preview with #428DBA

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

Preview Lab → · Contrast checker → · Palette generator →