#40B4E0#40B4E0

#40B4E0 is a light, moderate cyan. Relative luminance 0.391; OKLCH L 72.4% C 0.120 H 227.5°. Best body text is #000000 at 8.82:1 contrast (WCAG AA passes).

Color values

HEX	#40B4E0
RGB	rgb(64, 180, 224)
HSL	hsl(197, 72%, 56%)
HSV	hsv(197, 71%, 88%)
CMYK	cmyk(71.4%, 19.6%, 0%, 12.2%)
CIE-LAB	lab(68.83, -18.24, -31.44)
CIE-LCH	lch(68.83, 36.35, 239.89°)
OKLab	oklab(72.36% -0.0808 -0.0881)
OKLCH	oklch(72.36% 0.12 227.5)
XYZ	xyz(31.8847, 39.1107, 76.3752)
Luminance	0.3911 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40B4E0 #E06C40

analogous

#40E0BC #40B4E0 #4064E0

triadic

#40B4E0 #E040B4 #B4E040

tetradic

#40B4E0 #BC40E0 #E06C40 #64E040

square

#40B4E0 #BC40E0 #E06C40 #64E040

split-complementary

#40B4E0 #E04064 #E0BC40

monochromatic

#176E8E #2096C3 #40B4E0 #75C9E9 #A9DDF1

Accessibility & contrast

On white

2.38

#40B4E0 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.82

#40B4E0 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #40B4E0

8.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40B4E0	#FFFFFF	#000000	##000000
##40B4E0	1.00	2.38	8.82	8.82
#FFFFFF	2.38	1.00	21.00	21.00
#000000	8.82	21.00	1.00	1.00
##000000	8.82	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9DB1E2

Deuteranopia (green-blind)

#87A1DF

Tritanopia (blue-blind)

#00C1C2

Achromatopsia (no color)

#A8A8A8

Design tokens & code

CSS

--color: #40b4e0;
/* rgb */ color: rgb(64, 180, 224);
/* oklch */ color: oklch(72.4% 0.120 227.5);

Tailwind

colors: {
  custom: {
    50: '#89cae9',
    500: '#40b4e0',
    950: '#000000',
  },
}

SCSS

$custom: #40b4e0;
$custom-light: #89cae9;
$custom-dark: #000000;

JSON

{
  "hex": "#40b4e0",
  "rgb": {
    "r": 64,
    "g": 180,
    "b": 224
  },
  "hsl": {
    "h": 196.5,
    "s": 72.072,
    "l": 56.471
  },
  "oklch": {
    "l": 0.72363,
    "c": 0.11956,
    "h": 227.5
  },
  "luminance": 0.39114
}

Semantic roles & 50–950 ramp

primary

#40B4E0

secondary

#DFAF9D

accent

#6B39EF

background

#F9FCFE

surface

#F1F8FD

border

#CBD1D5

text

#0D1316

muted

#7E8284

Preview Lab

Preview with #40B4E0

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

Preview Lab → · Contrast checker → · Palette generator →