#42B7D8#42B7D8

#42B7D8 is a light, moderate cyan. Relative luminance 0.400; OKLCH L 72.8% C 0.112 H 220.4°. Best body text is #000000 at 9.00:1 contrast (WCAG AA passes).

Color values

HEX	#42B7D8
RGB	rgb(66, 183, 216)
HSL	hsl(193, 66%, 55%)
HSV	hsv(193, 69%, 85%)
CMYK	cmyk(69.4%, 15.3%, 0%, 15.3%)
CIE-LAB	lab(69.45, -22.07, -26.10)
CIE-LCH	lch(69.45, 34.18, 229.78°)
OKLab	oklab(72.78% -0.0857 -0.0729)
OKLCH	oklch(72.78% 0.112 220.4)
XYZ	xyz(31.5698, 39.9795, 71.0054)
Luminance	0.3998 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B7D8 #D86342

analogous

#42D8AE #42B7D8 #426CD8

triadic

#42B7D8 #D842B7 #B7D842

tetradic

#42B7D8 #AE42D8 #D86342 #6CD842

square

#42B7D8 #AE42D8 #D86342 #6CD842

split-complementary

#42B7D8 #D8426C #D8AE42

monochromatic

#1B6D84 #2697B7 #42B7D8 #75CAE2 #A7DEED

Accessibility & contrast

On white

2.33

#42B7D8 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.00

#42B7D8 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B7D8

9.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B7D8	#FFFFFF	#000000	##000000
##42B7D8	1.00	2.33	9.00	9.00
#FFFFFF	2.33	1.00	21.00	21.00
#000000	9.00	21.00	1.00	1.00
##000000	9.00	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A3B2DA

Deuteranopia (green-blind)

#8EA3D8

Tritanopia (blue-blind)

#00C2C1

Achromatopsia (no color)

#AAAAAA

Design tokens & code

CSS

--color: #42b7d8;
/* rgb */ color: rgb(66, 183, 216);
/* oklch */ color: oklch(72.8% 0.112 220.4);

Tailwind

colors: {
  custom: {
    50: '#89cce4',
    500: '#42b7d8',
    950: '#000000',
  },
}

SCSS

$custom: #42b7d8;
$custom-light: #89cce4;
$custom-dark: #000000;

JSON

{
  "hex": "#42b7d8",
  "rgb": {
    "r": 66,
    "g": 183,
    "b": 216
  },
  "hsl": {
    "h": 193.2,
    "s": 65.789,
    "l": 55.294
  },
  "oklch": {
    "l": 0.72776,
    "c": 0.11249,
    "h": 220.4
  },
  "luminance": 0.39983
}

Semantic roles & 50–950 ramp

primary

#42B7D8

secondary

#DAA99C

accent

#643FE9

background

#F9FCFD

surface

#F1F9FB

border

#CBD2D4

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #42B7D8

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

Preview Lab → · Contrast checker → · Palette generator →