#40B8DF#40B8DF

#40B8DF is a light, moderate cyan. Relative luminance 0.407; OKLCH L 73.3% C 0.118 H 223.8°. Best body text is #000000 at 9.14:1 contrast (WCAG AA passes).

Color values

HEX	#40B8DF
RGB	rgb(64, 184, 223)
HSL	hsl(195, 71%, 56%)
HSV	hsv(195, 71%, 87%)
CMYK	cmyk(71.3%, 17.5%, 0%, 12.5%)
CIE-LAB	lab(69.96, -20.64, -29.15)
CIE-LCH	lch(69.96, 35.72, 234.70°)
OKLab	oklab(73.26% -0.085 -0.0816)
OKLCH	oklch(73.26% 0.118 223.8)
XYZ	xyz(32.5687, 40.6949, 75.9362)
Luminance	0.4070 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40B8DF #DF6740

analogous

#40DFB7 #40B8DF #4069DF

triadic

#40B8DF #DF40B8 #B8DF40

tetradic

#40B8DF #B740DF #DF6740 #69DF40

square

#40B8DF #B740DF #DF6740 #69DF40

split-complementary

#40B8DF #DF4069 #DFB740

monochromatic

#18708D #209AC1 #40B8DF #74CBE8 #A9DFF1

Accessibility & contrast

On white

2.30

#40B8DF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.14

#40B8DF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #40B8DF

9.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40B8DF	#FFFFFF	#000000	##000000
##40B8DF	1.00	2.30	9.14	9.14
#FFFFFF	2.30	1.00	21.00	21.00
#000000	9.14	21.00	1.00	1.00
##000000	9.14	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A2B4E1

Deuteranopia (green-blind)

#8CA4DF

Tritanopia (blue-blind)

#00C4C5

Achromatopsia (no color)

#ABABAB

Design tokens & code

CSS

--color: #40b8df;
/* rgb */ color: rgb(64, 184, 223);
/* oklch */ color: oklch(73.3% 0.118 223.8);

Tailwind

colors: {
  custom: {
    50: '#89cde9',
    500: '#40b8df',
    950: '#000000',
  },
}

SCSS

$custom: #40b8df;
$custom-light: #89cde9;
$custom-dark: #000000;

JSON

{
  "hex": "#40b8df",
  "rgb": {
    "r": 64,
    "g": 184,
    "b": 223
  },
  "hsl": {
    "h": 194.717,
    "s": 71.3,
    "l": 56.275
  },
  "oklch": {
    "l": 0.73255,
    "c": 0.11782,
    "h": 223.8
  },
  "luminance": 0.40699
}

Semantic roles & 50–950 ramp

primary

#40B8DF

secondary

#DEAD9D

accent

#663AEE

background

#F9FCFE

surface

#F1F9FC

border

#CBD2D5

text

#0D1316

muted

#7E8284

Preview Lab

Preview with #40B8DF

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

Preview Lab → · Contrast checker → · Palette generator →