#40B4D9#40B4D9

#40B4D9 is a light, moderate cyan. Relative luminance 0.387; OKLCH L 72.1% C 0.114 H 223.2°. Best body text is #000000 at 8.75:1 contrast (WCAG AA passes).

Color values

HEX	#40B4D9
RGB	rgb(64, 180, 217)
HSL	hsl(195, 67%, 55%)
HSV	hsv(195, 71%, 85%)
CMYK	cmyk(70.5%, 17.1%, 0%, 14.9%)
CIE-LAB	lab(68.56, -20.48, -28.02)
CIE-LCH	lch(68.56, 34.71, 233.84°)
OKLab	oklab(72.06% -0.0833 -0.0784)
OKLCH	oklch(72.06% 0.114 223.2)
XYZ	xyz(30.9549, 38.7387, 71.4781)
Luminance	0.3874 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40B4D9 #D96540

analogous

#40D9B2 #40B4D9 #4067D9

triadic

#40B4D9 #D940B4 #B4D940

tetradic

#40B4D9 #B240D9 #D96540 #67D940

square

#40B4D9 #B240D9 #D96540 #67D940

split-complementary

#40B4D9 #D94067 #D9B240

monochromatic

#1A6B84 #2494B7 #40B4D9 #73C8E3 #A6DCED

Accessibility & contrast

On white

2.40

#40B4D9 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.75

#40B4D9 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #40B4D9

8.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40B4D9	#FFFFFF	#000000	##000000
##40B4D9	1.00	2.40	8.75	8.75
#FFFFFF	2.40	1.00	21.00	21.00
#000000	8.75	21.00	1.00	1.00
##000000	8.75	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9FB0DB

Deuteranopia (green-blind)

#8AA1D9

Tritanopia (blue-blind)

#00BFC0

Achromatopsia (no color)

#A7A7A7

Design tokens & code

CSS

--color: #40b4d9;
/* rgb */ color: rgb(64, 180, 217);
/* oklch */ color: oklch(72.1% 0.114 223.2);

Tailwind

colors: {
  custom: {
    50: '#88cae4',
    500: '#40b4d9',
    950: '#000000',
  },
}

SCSS

$custom: #40b4d9;
$custom-light: #88cae4;
$custom-dark: #000000;

JSON

{
  "hex": "#40b4d9",
  "rgb": {
    "r": 64,
    "g": 180,
    "b": 217
  },
  "hsl": {
    "h": 194.51,
    "s": 66.812,
    "l": 55.098
  },
  "oklch": {
    "l": 0.72058,
    "c": 0.1144,
    "h": 223.2
  },
  "luminance": 0.38742
}

Semantic roles & 50–950 ramp

primary

#40B4D9

secondary

#DAAA9A

accent

#683EEA

background

#F9FCFD

surface

#F1F8FB

border

#CBD1D4

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #40B4D9

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

Preview Lab → · Contrast checker → · Palette generator →