#42A9CC#42A9CC

#42A9CC is a light, moderate cyan. Relative luminance 0.339; OKLCH L 69.0% C 0.106 H 224.2°. Best body text is #000000 at 7.78:1 contrast (WCAG AA passes).

Color values

HEX	#42A9CC
RGB	rgb(66, 169, 204)
HSL	hsl(195, 58%, 53%)
HSV	hsv(195, 68%, 80%)
CMYK	cmyk(67.6%, 17.2%, 0%, 20%)
CIE-LAB	lab(64.88, -18.59, -26.52)
CIE-LCH	lch(64.88, 32.39, 234.98°)
OKLab	oklab(68.96% -0.0762 -0.0741)
OKLCH	oklch(68.96% 0.106 224.2)
XYZ	xyz(27.3294, 33.8908, 62.2163)
Luminance	0.3389 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42A9CC #CC6542

analogous

#42CCAA #42A9CC #4264CC

triadic

#42A9CC #CC42A9 #A9CC42

tetradic

#42A9CC #AA42CC #CC6542 #64CC42

square

#42A9CC #AA42CC #CC6542 #64CC42

split-complementary

#42A9CC #CC4264 #CCAA42

monochromatic

#1F5F74 #2C86A4 #42A9CC #72BFD9 #A2D5E6

Accessibility & contrast

On white

2.70

#42A9CC on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.78

#42A9CC on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42A9CC

7.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42A9CC	#FFFFFF	#000000	##000000
##42A9CC	1.00	2.70	7.78	7.78
#FFFFFF	2.70	1.00	21.00	21.00
#000000	7.78	21.00	1.00	1.00
##000000	7.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#95A5CE

Deuteranopia (green-blind)

#8297CC

Tritanopia (blue-blind)

#00B4B4

Achromatopsia (no color)

#9D9D9D

Design tokens & code

CSS

--color: #42a9cc;
/* rgb */ color: rgb(66, 169, 204);
/* oklch */ color: oklch(69.0% 0.106 224.2);

Tailwind

colors: {
  custom: {
    50: '#86c2db',
    500: '#42a9cc',
    950: '#000000',
  },
}

SCSS

$custom: #42a9cc;
$custom-light: #86c2db;
$custom-dark: #000000;

JSON

{
  "hex": "#42a9cc",
  "rgb": {
    "r": 66,
    "g": 169,
    "b": 204
  },
  "hsl": {
    "h": 195.217,
    "s": 57.5,
    "l": 52.941
  },
  "oklch": {
    "l": 0.68957,
    "c": 0.1063,
    "h": 224.2
  },
  "luminance": 0.33894
}

Semantic roles & 50–950 ramp

primary

#42A9CC

secondary

#D3A697

accent

#6E47E1

background

#F8FBFD

surface

#F0F7FB

border

#CBD0D4

text

#0C1215

muted

#7D8183

Preview Lab

Preview with #42A9CC

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

Preview Lab → · Contrast checker → · Palette generator →