#40B4D8#40B4D8

#40B4D8 is a light, moderate cyan. Relative luminance 0.387; OKLCH L 72.0% C 0.114 H 222.6°. Best body text is #000000 at 8.74:1 contrast (WCAG AA passes).

Color values

HEX	#40B4D8
RGB	rgb(64, 180, 216)
HSL	hsl(194, 66%, 55%)
HSV	hsv(194, 70%, 85%)
CMYK	cmyk(70.4%, 16.7%, 0%, 15.3%)
CIE-LAB	lab(68.52, -20.80, -27.53)
CIE-LCH	lch(68.52, 34.51, 232.93°)
OKLab	oklab(72.02% -0.0837 -0.077)
OKLCH	oklch(72.02% 0.114 222.6)
XYZ	xyz(30.8252, 38.6868, 70.7952)
Luminance	0.3869 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40B4D8 #D86440

analogous

#40D8B0 #40B4D8 #4068D8

triadic

#40B4D8 #D840B4 #B4D840

tetradic

#40B4D8 #B040D8 #D86440 #68D840

square

#40B4D8 #B040D8 #D86440 #68D840

split-complementary

#40B4D8 #D84068 #D8B040

monochromatic

#1B6A83 #2593B6 #40B4D8 #73C8E2 #A6DCED

Accessibility & contrast

On white

2.40

#40B4D8 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.74

#40B4D8 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #40B4D8

8.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40B4D8	#FFFFFF	#000000	##000000
##40B4D8	1.00	2.40	8.74	8.74
#FFFFFF	2.40	1.00	21.00	21.00
#000000	8.74	21.00	1.00	1.00
##000000	8.74	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9FB0DA

Deuteranopia (green-blind)

#8AA0D8

Tritanopia (blue-blind)

#00BFC0

Achromatopsia (no color)

#A7A7A7

Design tokens & code

CSS

--color: #40b4d8;
/* rgb */ color: rgb(64, 180, 216);
/* oklch */ color: oklch(72.0% 0.114 222.6);

Tailwind

colors: {
  custom: {
    50: '#88cae4',
    500: '#40b4d8',
    950: '#000000',
  },
}

SCSS

$custom: #40b4d8;
$custom-light: #88cae4;
$custom-dark: #000000;

JSON

{
  "hex": "#40b4d8",
  "rgb": {
    "r": 64,
    "g": 180,
    "b": 216
  },
  "hsl": {
    "h": 194.211,
    "s": 66.087,
    "l": 54.902
  },
  "oklch": {
    "l": 0.72015,
    "c": 0.11373,
    "h": 222.6
  },
  "luminance": 0.3869
}

Semantic roles & 50–950 ramp

primary

#40B4D8

secondary

#DAA99A

accent

#673FE9

background

#F9FCFD

surface

#F1F8FB

border

#CBD1D4

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #40B4D8

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

Preview Lab → · Contrast checker → · Palette generator →