#42B4D3#42B4D3

#42B4D3 is a light, moderate cyan. Relative luminance 0.385; OKLCH L 71.9% C 0.110 H 219.5°. Best body text is #000000 at 8.70:1 contrast (WCAG AA passes).

Color values

HEX	#42B4D3
RGB	rgb(66, 180, 211)
HSL	hsl(193, 62%, 54%)
HSV	hsv(193, 69%, 83%)
CMYK	cmyk(68.7%, 14.7%, 0%, 17.3%)
CIE-LAB	lab(68.39, -22.10, -24.99)
CIE-LCH	lch(68.39, 33.36, 228.52°)
OKLab	oklab(71.86% -0.0846 -0.0697)
OKLCH	oklch(71.86% 0.11 219.5)
XYZ	xyz(30.3210, 38.5005, 67.4487)
Luminance	0.3850 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B4D3 #D36142

analogous

#42D3AA #42B4D3 #426BD3

triadic

#42B4D3 #D342B4 #B4D342

tetradic

#42B4D3 #AA42D3 #D36142 #6BD342

square

#42B4D3 #AA42D3 #D36142 #6BD342

split-complementary

#42B4D3 #D3426B #D3AA42

monochromatic

#1D697D #2992AF #42B4D3 #74C8DF #A5DBEA

Accessibility & contrast

On white

2.41

#42B4D3 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.70

#42B4D3 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B4D3

8.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B4D3	#FFFFFF	#000000	##000000
##42B4D3	1.00	2.41	8.70	8.70
#FFFFFF	2.41	1.00	21.00	21.00
#000000	8.70	21.00	1.00	1.00
##000000	8.70	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A1AFD5

Deuteranopia (green-blind)

#8DA0D3

Tritanopia (blue-blind)

#00BEBE

Achromatopsia (no color)

#A7A7A7

Design tokens & code

CSS

--color: #42b4d3;
/* rgb */ color: rgb(66, 180, 211);
/* oklch */ color: oklch(71.9% 0.110 219.5);

Tailwind

colors: {
  custom: {
    50: '#88cae0',
    500: '#42b4d3',
    950: '#000000',
  },
}

SCSS

$custom: #42b4d3;
$custom-light: #88cae0;
$custom-dark: #000000;

JSON

{
  "hex": "#42b4d3",
  "rgb": {
    "r": 66,
    "g": 180,
    "b": 211
  },
  "hsl": {
    "h": 192.828,
    "s": 62.232,
    "l": 54.314
  },
  "oklch": {
    "l": 0.71859,
    "c": 0.10966,
    "h": 219.5
  },
  "luminance": 0.38504
}

Semantic roles & 50–950 ramp

primary

#42B4D3

secondary

#D7A79A

accent

#6542E5

background

#F9FCFD

surface

#F1F8FB

border

#CBD1D4

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #42B4D3

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

Preview Lab → · Contrast checker → · Palette generator →