#40B0DB#40B0DB

#40B0DB is a light, moderate cyan. Relative luminance 0.373; OKLCH L 71.2% C 0.117 H 227.7°. Best body text is #000000 at 8.45:1 contrast (WCAG AA passes).

Color values

HEX	#40B0DB
RGB	rgb(64, 176, 219)
HSL	hsl(197, 68%, 55%)
HSV	hsv(197, 71%, 86%)
CMYK	cmyk(70.8%, 19.6%, 0%, 14.1%)
CIE-LAB	lab(67.47, -17.75, -30.81)
CIE-LCH	lch(67.47, 35.56, 240.06°)
OKLab	oklab(71.21% -0.0787 -0.0864)
OKLCH	oklch(71.21% 0.117 227.7)
XYZ	xyz(30.4207, 37.2517, 72.5911)
Luminance	0.3725 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40B0DB #DB6B40

analogous

#40DBB8 #40B0DB #4062DB

triadic

#40B0DB #DB40B0 #B0DB40

tetradic

#40B0DB #B840DB #DB6B40 #62DB40

square

#40B0DB #B840DB #DB6B40 #62DB40

split-complementary

#40B0DB #DB4062 #DBB840

monochromatic

#196987 #2391BB #40B0DB #73C5E5 #A7DBEE

Accessibility & contrast

On white

2.48

#40B0DB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.45

#40B0DB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #40B0DB

8.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40B0DB	#FFFFFF	#000000	##000000
##40B0DB	1.00	2.48	8.45	8.45
#FFFFFF	2.48	1.00	21.00	21.00
#000000	8.45	21.00	1.00	1.00
##000000	8.45	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#99ADDD

Deuteranopia (green-blind)

#849EDA

Tritanopia (blue-blind)

#00BCBE

Achromatopsia (no color)

#A4A4A4

Design tokens & code

CSS

--color: #40b0db;
/* rgb */ color: rgb(64, 176, 219);
/* oklch */ color: oklch(71.2% 0.117 227.7);

Tailwind

colors: {
  custom: {
    50: '#88c7e6',
    500: '#40b0db',
    950: '#000000',
  },
}

SCSS

$custom: #40b0db;
$custom-light: #88c7e6;
$custom-dark: #000000;

JSON

{
  "hex": "#40b0db",
  "rgb": {
    "r": 64,
    "g": 176,
    "b": 219
  },
  "hsl": {
    "h": 196.645,
    "s": 68.282,
    "l": 55.49
  },
  "oklch": {
    "l": 0.71206,
    "c": 0.11683,
    "h": 227.7
  },
  "luminance": 0.37255
}

Semantic roles & 50–950 ramp

primary

#40B0DB

secondary

#DCAD9B

accent

#6D3DEB

background

#F9FCFE

surface

#F1F8FC

border

#CBD1D5

text

#0D1316

muted

#7E8284

Preview Lab

Preview with #40B0DB

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

Preview Lab → · Contrast checker → · Palette generator →