#42A8CB#42A8CB

#42A8CB is a light, moderate cyan. Relative luminance 0.335; OKLCH L 68.7% C 0.106 H 224.4°. Best body text is #000000 at 7.69:1 contrast (WCAG AA passes).

Color values

HEX	#42A8CB
RGB	rgb(66, 168, 203)
HSL	hsl(195, 57%, 53%)
HSV	hsv(195, 67%, 80%)
CMYK	cmyk(67.5%, 17.2%, 0%, 20.4%)
CIE-LAB	lab(64.54, -18.38, -26.48)
CIE-LCH	lch(64.54, 32.23, 235.24°)
OKLab	oklab(68.68% -0.0756 -0.074)
OKLCH	oklch(68.68% 0.106 224.4)
XYZ	xyz(27.0245, 33.4723, 61.5249)
Luminance	0.3347 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42A8CB #CB6542

analogous

#42CBA9 #42A8CB #4264CB

triadic

#42A8CB #CB42A8 #A8CB42

tetradic

#42A8CB #A942CB #CB6542 #64CB42

square

#42A8CB #A942CB #CB6542 #64CB42

split-complementary

#42A8CB #CB4264 #CBA942

monochromatic

#205E73 #2D85A3 #42A8CB #72BED8 #A2D4E5

Accessibility & contrast

On white

2.73

#42A8CB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.69

#42A8CB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42A8CB

7.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42A8CB	#FFFFFF	#000000	##000000
##42A8CB	1.00	2.73	7.69	7.69
#FFFFFF	2.73	1.00	21.00	21.00
#000000	7.69	21.00	1.00	1.00
##000000	7.69	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#94A4CD

Deuteranopia (green-blind)

#8196CB

Tritanopia (blue-blind)

#00B3B3

Achromatopsia (no color)

#9C9C9C

Design tokens & code

CSS

--color: #42a8cb;
/* rgb */ color: rgb(66, 168, 203);
/* oklch */ color: oklch(68.7% 0.106 224.4);

Tailwind

colors: {
  custom: {
    50: '#86c2db',
    500: '#42a8cb',
    950: '#000000',
  },
}

SCSS

$custom: #42a8cb;
$custom-light: #86c2db;
$custom-dark: #000000;

JSON

{
  "hex": "#42a8cb",
  "rgb": {
    "r": 66,
    "g": 168,
    "b": 203
  },
  "hsl": {
    "h": 195.328,
    "s": 56.846,
    "l": 52.745
  },
  "oklch": {
    "l": 0.68677,
    "c": 0.10575,
    "h": 224.4
  },
  "luminance": 0.33475
}

Semantic roles & 50–950 ramp

primary

#42A8CB

secondary

#D2A697

accent

#6F48E0

background

#F8FBFD

surface

#F0F7FA

border

#CBD0D3

text

#0C1215

muted

#7D8183

Preview Lab

Preview with #42A8CB

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

Preview Lab → · Contrast checker → · Palette generator →