#40B4DB#40B4DB

#40B4DB is a light, moderate cyan. Relative luminance 0.388; OKLCH L 72.1% C 0.116 H 224.5°. Best body text is #000000 at 8.77:1 contrast (WCAG AA passes).

Color values

HEX	#40B4DB
RGB	rgb(64, 180, 219)
HSL	hsl(195, 68%, 55%)
HSV	hsv(195, 71%, 86%)
CMYK	cmyk(70.8%, 17.8%, 0%, 14.1%)
CIE-LAB	lab(68.64, -19.84, -29.00)
CIE-LCH	lch(68.64, 35.14, 235.62°)
OKLab	oklab(72.14% -0.0826 -0.0812)
OKLCH	oklch(72.14% 0.116 224.5)
XYZ	xyz(31.2166, 38.8434, 72.8564)
Luminance	0.3885 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40B4DB #DB6740

analogous

#40DBB5 #40B4DB #4066DB

triadic

#40B4DB #DB40B4 #B4DB40

tetradic

#40B4DB #B540DB #DB6740 #66DB40

square

#40B4DB #B540DB #DB6740 #66DB40

split-complementary

#40B4DB #DB4066 #DBB540

monochromatic

#196C87 #2395BB #40B4DB #73C8E5 #A7DCEE

Accessibility & contrast

On white

2.39

#40B4DB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.77

#40B4DB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #40B4DB

8.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40B4DB	#FFFFFF	#000000	##000000
##40B4DB	1.00	2.39	8.77	8.77
#FFFFFF	2.39	1.00	21.00	21.00
#000000	8.77	21.00	1.00	1.00
##000000	8.77	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9EB0DD

Deuteranopia (green-blind)

#89A1DB

Tritanopia (blue-blind)

#00C0C1

Achromatopsia (no color)

#A7A7A7

Design tokens & code

CSS

--color: #40b4db;
/* rgb */ color: rgb(64, 180, 219);
/* oklch */ color: oklch(72.1% 0.116 224.5);

Tailwind

colors: {
  custom: {
    50: '#88cae6',
    500: '#40b4db',
    950: '#000000',
  },
}

SCSS

$custom: #40b4db;
$custom-light: #88cae6;
$custom-dark: #000000;

JSON

{
  "hex": "#40b4db",
  "rgb": {
    "r": 64,
    "g": 180,
    "b": 219
  },
  "hsl": {
    "h": 195.097,
    "s": 68.282,
    "l": 55.49
  },
  "oklch": {
    "l": 0.72144,
    "c": 0.1158,
    "h": 224.5
  },
  "luminance": 0.38847
}

Semantic roles & 50–950 ramp

primary

#40B4DB

secondary

#DCAB9B

accent

#693DEB

background

#F9FCFE

surface

#F1F8FC

border

#CBD1D5

text

#0D1316

muted

#7E8284

Preview Lab

Preview with #40B4DB

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

Preview Lab → · Contrast checker → · Palette generator →