#428DBF#428DBF

#428DBF is a mid, moderate cyan. Relative luminance 0.240; OKLCH L 61.8% C 0.106 H 240.7°. Best body text is #000000 at 5.79:1 contrast (WCAG AA passes).

Color values

HEX	#428DBF
RGB	rgb(66, 141, 191)
HSL	hsl(204, 49%, 50%)
HSV	hsv(204, 65%, 75%)
CMYK	cmyk(65.4%, 26.2%, 0%, 25.1%)
CIE-LAB	lab(56.06, -7.49, -32.89)
CIE-LCH	lch(56.06, 33.73, 257.17°)
OKLab	oklab(61.76% -0.0519 -0.0925)
OKLCH	oklch(61.76% 0.106 240.7)
XYZ	xyz(21.1720, 23.9674, 52.7905)
Luminance	0.2397 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428DBF #BF7442

analogous

#42BFB2 #428DBF #424EBF

triadic

#428DBF #BF428D #8DBF42

tetradic

#428DBF #B242BF #BF7442 #4EBF42

square

#428DBF #B242BF #BF7442 #4EBF42

split-complementary

#428DBF #BF424E #BFB242

monochromatic

#224A65 #326C92 #428DBF #70A9CE #9DC4DE

Accessibility & contrast

On white

3.62

#428DBF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.79

#428DBF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428DBF

5.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428DBF	#FFFFFF	#000000	##000000
##428DBF	1.00	3.62	5.79	5.79
#FFFFFF	3.62	1.00	21.00	21.00
#000000	5.79	21.00	1.00	1.00
##000000	5.79	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#768DC1

Deuteranopia (green-blind)

#6581BE

Tritanopia (blue-blind)

#00999E

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #428dbf;
/* rgb */ color: rgb(66, 141, 191);
/* oklch */ color: oklch(61.8% 0.106 240.7);

Tailwind

colors: {
  custom: {
    50: '#83aed2',
    500: '#428dbf',
    950: '#000000',
  },
}

SCSS

$custom: #428dbf;
$custom-light: #83aed2;
$custom-dark: #000000;

JSON

{
  "hex": "#428dbf",
  "rgb": {
    "r": 66,
    "g": 141,
    "b": 191
  },
  "hsl": {
    "h": 204,
    "s": 49.407,
    "l": 50.392
  },
  "oklch": {
    "l": 0.61757,
    "c": 0.10611,
    "h": 240.7
  },
  "luminance": 0.2397
}

Semantic roles & 50–950 ramp

primary

#428DBF

secondary

#CAA993

accent

#864FD9

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0C1014

muted

#7D7F82

Preview Lab

Preview with #428DBF

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

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