#42A4D5#42A4D5

#42A4D5 is a light, moderate cyan. Relative luminance 0.325; OKLCH L 68.2% C 0.115 H 234.0°. Best body text is #000000 at 7.50:1 contrast (WCAG AA passes).

Color values

HEX	#42A4D5
RGB	rgb(66, 164, 213)
HSL	hsl(200, 64%, 55%)
HSV	hsv(200, 69%, 84%)
CMYK	cmyk(69%, 23%, 0%, 16.5%)
CIE-LAB	lab(63.76, -12.99, -33.23)
CIE-LCH	lch(63.76, 35.68, 248.65°)
OKLab	oklab(68.19% -0.0679 -0.0934)
OKLCH	oklch(68.19% 0.115 234)
XYZ	xyz(27.5277, 32.5102, 67.7622)
Luminance	0.3251 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42A4D5 #D57342

analogous

#42D5BC #42A4D5 #425BD5

triadic

#42A4D5 #D542A4 #A4D542

tetradic

#42A4D5 #BC42D5 #D57342 #5BD542

square

#42A4D5 #BC42D5 #D57342 #5BD542

split-complementary

#42A4D5 #D5425B #D5BC42

monochromatic

#1C5F80 #2884B2 #42A4D5 #74BCE0 #A6D4EB

Accessibility & contrast

On white

2.80

#42A4D5 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.50

#42A4D5 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #42A4D5

7.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42A4D5	#FFFFFF	#000000	##000000
##42A4D5	1.00	2.80	7.50	7.50
#FFFFFF	2.80	1.00	21.00	21.00
#000000	7.50	21.00	1.00	1.00
##000000	7.50	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8CA3D7

Deuteranopia (green-blind)

#7894D4

Tritanopia (blue-blind)

#00B1B4

Achromatopsia (no color)

#9A9A9A

Design tokens & code

CSS

--color: #42a4d5;
/* rgb */ color: rgb(66, 164, 213);
/* oklch */ color: oklch(68.2% 0.115 234.0);

Tailwind

colors: {
  custom: {
    50: '#87bfe2',
    500: '#42a4d5',
    950: '#000000',
  },
}

SCSS

$custom: #42a4d5;
$custom-light: #87bfe2;
$custom-dark: #000000;

JSON

{
  "hex": "#42a4d5",
  "rgb": {
    "r": 66,
    "g": 164,
    "b": 213
  },
  "hsl": {
    "h": 200,
    "s": 63.636,
    "l": 54.706
  },
  "oklch": {
    "l": 0.68187,
    "c": 0.11548,
    "h": 234
  },
  "luminance": 0.32513
}

Semantic roles & 50–950 ramp

primary

#42A4D5

secondary

#D8AF9A

accent

#7841E7

background

#F9FBFD

surface

#F1F6FB

border

#CBD0D4

text

#0D1215

muted

#7E8183

Preview Lab

Preview with #42A4D5

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

Preview Lab → · Contrast checker → · Palette generator →