#42B7DF#42B7DF

#42B7DF is a light, moderate cyan. Relative luminance 0.404; OKLCH L 73.1% C 0.117 H 224.8°. Best body text is #000000 at 9.07:1 contrast (WCAG AA passes).

Color values

HEX	#42B7DF
RGB	rgb(66, 183, 223)
HSL	hsl(195, 71%, 57%)
HSV	hsv(195, 70%, 87%)
CMYK	cmyk(70.4%, 17.9%, 0%, 12.5%)
CIE-LAB	lab(69.72, -19.86, -29.52)
CIE-LCH	lch(69.72, 35.58, 236.08°)
OKLab	oklab(73.07% -0.0831 -0.0826)
OKLCH	oklch(73.07% 0.117 224.8)
XYZ	xyz(32.4941, 40.3492, 75.8734)
Luminance	0.4035 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B7DF #DF6A42

analogous

#42DFB9 #42B7DF #4269DF

triadic

#42B7DF #DF42B7 #B7DF42

tetradic

#42B7DF #B942DF #DF6A42 #69DF42

square

#42B7DF #B942DF #DF6A42 #69DF42

split-complementary

#42B7DF #DF4269 #DFB942

monochromatic

#18708E #219AC3 #42B7DF #76CBE8 #ABDFF1

Accessibility & contrast

On white

2.32

#42B7DF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.07

#42B7DF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B7DF

9.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B7DF	#FFFFFF	#000000	##000000
##42B7DF	1.00	2.32	9.07	9.07
#FFFFFF	2.32	1.00	21.00	21.00
#000000	9.07	21.00	1.00	1.00
##000000	9.07	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A1B3E1

Deuteranopia (green-blind)

#8BA3DF

Tritanopia (blue-blind)

#00C3C4

Achromatopsia (no color)

#AAAAAA

Design tokens & code

CSS

--color: #42b7df;
/* rgb */ color: rgb(66, 183, 223);
/* oklch */ color: oklch(73.1% 0.117 224.8);

Tailwind

colors: {
  custom: {
    50: '#8acce9',
    500: '#42b7df',
    950: '#000000',
  },
}

SCSS

$custom: #42b7df;
$custom-light: #8acce9;
$custom-dark: #000000;

JSON

{
  "hex": "#42b7df",
  "rgb": {
    "r": 66,
    "g": 183,
    "b": 223
  },
  "hsl": {
    "h": 195.287,
    "s": 71.041,
    "l": 56.667
  },
  "oklch": {
    "l": 0.73073,
    "c": 0.11718,
    "h": 224.8
  },
  "luminance": 0.40353
}

Semantic roles & 50–950 ramp

primary

#42B7DF

secondary

#DFAF9E

accent

#683AEE

background

#F9FCFE

surface

#F1F8FC

border

#CBD1D5

text

#0D1316

muted

#7E8284

Preview Lab

Preview with #42B7DF

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

Preview Lab → · Contrast checker → · Palette generator →