#40ADD9#40ADD9

#40ADD9 is a light, moderate cyan. Relative luminance 0.360; OKLCH L 70.4% C 0.116 H 228.8°. Best body text is #000000 at 8.20:1 contrast (WCAG AA passes).

Color values

HEX	#40ADD9
RGB	rgb(64, 173, 217)
HSL	hsl(197, 67%, 55%)
HSV	hsv(197, 71%, 85%)
CMYK	cmyk(70.5%, 20.3%, 0%, 14.9%)
CIE-LAB	lab(66.51, -16.81, -31.19)
CIE-LCH	lch(66.51, 35.43, 241.68°)
OKLab	oklab(70.41% -0.0765 -0.0875)
OKLCH	oklch(70.41% 0.116 228.8)
XYZ	xyz(29.5773, 35.9835, 71.0189)
Luminance	0.3599 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40ADD9 #D96C40

analogous

#40D9B9 #40ADD9 #4060D9

triadic

#40ADD9 #D940AD #ADD940

tetradic

#40ADD9 #B940D9 #D96C40 #60D940

square

#40ADD9 #B940D9 #D96C40 #60D940

split-complementary

#40ADD9 #D94060 #D9B940

monochromatic

#1A6684 #248DB7 #40ADD9 #73C3E3 #A6D9ED

Accessibility & contrast

On white

2.56

#40ADD9 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.20

#40ADD9 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #40ADD9

8.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40ADD9	#FFFFFF	#000000	##000000
##40ADD9	1.00	2.56	8.20	8.20
#FFFFFF	2.56	1.00	21.00	21.00
#000000	8.20	21.00	1.00	1.00
##000000	8.20	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#96AADB

Deuteranopia (green-blind)

#819BD8

Tritanopia (blue-blind)

#00B9BC

Achromatopsia (no color)

#A2A2A2

Design tokens & code

CSS

--color: #40add9;
/* rgb */ color: rgb(64, 173, 217);
/* oklch */ color: oklch(70.4% 0.116 228.8);

Tailwind

colors: {
  custom: {
    50: '#87c5e5',
    500: '#40add9',
    950: '#000000',
  },
}

SCSS

$custom: #40add9;
$custom-light: #87c5e5;
$custom-dark: #000000;

JSON

{
  "hex": "#40add9",
  "rgb": {
    "r": 64,
    "g": 173,
    "b": 217
  },
  "hsl": {
    "h": 197.255,
    "s": 66.812,
    "l": 55.098
  },
  "oklch": {
    "l": 0.70414,
    "c": 0.11618,
    "h": 228.8
  },
  "luminance": 0.35987
}

Semantic roles & 50–950 ramp

primary

#40ADD9

secondary

#DAAD9A

accent

#6F3EEA

background

#F9FCFE

surface

#F1F8FC

border

#CBD1D5

text

#0D1315

muted

#7E8284

Preview Lab

Preview with #40ADD9

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

Preview Lab → · Contrast checker → · Palette generator →