#42789B#42789B

#42789B is a mid, moderate cyan. Relative luminance 0.170; OKLCH L 55.0% C 0.079 H 238.9°. Best body text is #FFFFFF at 4.78:1 contrast (WCAG AA passes).

Color values

HEX	#42789B
RGB	rgb(66, 120, 155)
HSL	hsl(204, 40%, 43%)
HSV	hsv(204, 57%, 61%)
CMYK	cmyk(57.4%, 22.6%, 0%, 39.2%)
CIE-LAB	lab(48.21, -7.28, -24.31)
CIE-LCH	lch(48.21, 25.38, 253.32°)
OKLab	oklab(55.02% -0.041 -0.068)
OKLCH	oklch(55.02% 0.079 238.9)
XYZ	xyz(14.8774, 16.9564, 33.4929)
Luminance	0.1696 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42789B #9B6542

analogous

#429B91 #42789B #424B9B

triadic

#42789B #9B4278 #789B42

tetradic

#42789B #91429B #9B6542 #4B9B42

square

#42789B #91429B #9B6542 #4B9B42

split-complementary

#42789B #9B424B #9B9142

monochromatic

#1D3645 #305770 #42789B #5F97BB #8AB3CD

Accessibility & contrast

On white

4.78

#42789B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.39

#42789B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #42789B

4.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42789B	#FFFFFF	#000000	##FFFFFF
##42789B	1.00	4.78	4.39	4.78
#FFFFFF	4.78	1.00	21.00	1.00
#000000	4.39	21.00	1.00	21.00
##FFFFFF	4.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#68789D

Deuteranopia (green-blind)

#5C6E9A

Tritanopia (blue-blind)

#008184

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #42789b;
/* rgb */ color: rgb(66, 120, 155);
/* oklch */ color: oklch(55.0% 0.079 238.9);

Tailwind

colors: {
  custom: {
    50: '#7e9eb8',
    500: '#42789b',
    950: '#000000',
  },
}

SCSS

$custom: #42789b;
$custom-light: #7e9eb8;
$custom-dark: #000000;

JSON

{
  "hex": "#42789b",
  "rgb": {
    "r": 66,
    "g": 120,
    "b": 155
  },
  "hsl": {
    "h": 203.596,
    "s": 40.271,
    "l": 43.333
  },
  "oklch": {
    "l": 0.55024,
    "c": 0.07939,
    "h": 238.9
  },
  "luminance": 0.16958
}

Semantic roles & 50–950 ramp

primary

#42789B

secondary

#B89681

accent

#8758D0

background

#F8F9FB

surface

#EFF2F6

border

#CACCD0

text

#0A0E11

muted

#7C7E80

Preview Lab

Preview with #42789B

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

Preview Lab → · Contrast checker → · Palette generator →