#42B1DD#42B1DD

#42B1DD is a light, moderate cyan. Relative luminance 0.378; OKLCH L 71.6% C 0.117 H 228.3°. Best body text is #000000 at 8.56:1 contrast (WCAG AA passes).

Color values

HEX	#42B1DD
RGB	rgb(66, 177, 221)
HSL	hsl(197, 70%, 56%)
HSV	hsv(197, 70%, 87%)
CMYK	cmyk(70.1%, 19.9%, 0%, 13.3%)
CIE-LAB	lab(67.89, -17.36, -31.25)
CIE-LCH	lch(67.89, 35.75, 240.96°)
OKLab	oklab(71.58% -0.0779 -0.0876)
OKLCH	oklch(71.58% 0.117 228.3)
XYZ	xyz(31.0148, 37.8195, 74.0579)
Luminance	0.3782 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42B1DD #DD6E42

analogous

#42DDBC #42B1DD #4264DD

triadic

#42B1DD #DD42B1 #B1DD42

tetradic

#42B1DD #BC42DD #DD6E42 #64DD42

square

#42B1DD #BC42DD #DD6E42 #64DD42

split-complementary

#42B1DD #DD4264 #DDBC42

monochromatic

#196B8C #2293BF #42B1DD #76C6E6 #AADCF0

Accessibility & contrast

On white

2.45

#42B1DD on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.56

#42B1DD on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42B1DD

8.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42B1DD	#FFFFFF	#000000	##000000
##42B1DD	1.00	2.45	8.56	8.56
#FFFFFF	2.45	1.00	21.00	21.00
#000000	8.56	21.00	1.00	1.00
##000000	8.56	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9AAEDF

Deuteranopia (green-blind)

#859FDC

Tritanopia (blue-blind)

#00BDBF

Achromatopsia (no color)

#A5A5A5

Design tokens & code

CSS

--color: #42b1dd;
/* rgb */ color: rgb(66, 177, 221);
/* oklch */ color: oklch(71.6% 0.117 228.3);

Tailwind

colors: {
  custom: {
    50: '#89c8e7',
    500: '#42b1dd',
    950: '#000000',
  },
}

SCSS

$custom: #42b1dd;
$custom-light: #89c8e7;
$custom-dark: #000000;

JSON

{
  "hex": "#42b1dd",
  "rgb": {
    "r": 66,
    "g": 177,
    "b": 221
  },
  "hsl": {
    "h": 197.032,
    "s": 69.507,
    "l": 56.275
  },
  "oklch": {
    "l": 0.71584,
    "c": 0.11727,
    "h": 228.3
  },
  "luminance": 0.37823
}

Semantic roles & 50–950 ramp

primary

#42B1DD

secondary

#DDB09D

accent

#6E3BEC

background

#F9FCFE

surface

#F1F8FC

border

#CBD1D5

text

#0D1316

muted

#7E8284

Preview Lab

Preview with #42B1DD

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

Preview Lab → · Contrast checker → · Palette generator →