#40B3D9#40B3D9

#40B3D9 is a light, moderate cyan. Relative luminance 0.383; OKLCH L 71.8% C 0.115 H 224.0°. Best body text is #000000 at 8.67:1 contrast (WCAG AA passes).

Color values

HEX	#40B3D9
RGB	rgb(64, 179, 217)
HSL	hsl(195, 67%, 55%)
HSV	hsv(195, 71%, 85%)
CMYK	cmyk(70.5%, 17.5%, 0%, 14.9%)
CIE-LAB	lab(68.27, -19.96, -28.48)
CIE-LCH	lch(68.27, 34.78, 234.97°)
OKLab	oklab(71.82% -0.0824 -0.0797)
OKLCH	oklch(71.82% 0.115 224)
XYZ	xyz(30.7537, 38.3364, 71.4110)
Luminance	0.3834 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40B3D9 #D96640

analogous

#40D9B2 #40B3D9 #4066D9

triadic

#40B3D9 #D940B3 #B3D940

tetradic

#40B3D9 #B240D9 #D96640 #66D940

square

#40B3D9 #B240D9 #D96640 #66D940

split-complementary

#40B3D9 #D94066 #D9B240

monochromatic

#1A6A84 #2493B7 #40B3D9 #73C7E3 #A6DCED

Accessibility & contrast

On white

2.42

#40B3D9 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.67

#40B3D9 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #40B3D9

8.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40B3D9	#FFFFFF	#000000	##000000
##40B3D9	1.00	2.42	8.67	8.67
#FFFFFF	2.42	1.00	21.00	21.00
#000000	8.67	21.00	1.00	1.00
##000000	8.67	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9EAFDB

Deuteranopia (green-blind)

#89A0D9

Tritanopia (blue-blind)

#00BFBF

Achromatopsia (no color)

#A6A6A6

Design tokens & code

CSS

--color: #40b3d9;
/* rgb */ color: rgb(64, 179, 217);
/* oklch */ color: oklch(71.8% 0.115 224.0);

Tailwind

colors: {
  custom: {
    50: '#88c9e4',
    500: '#40b3d9',
    950: '#000000',
  },
}

SCSS

$custom: #40b3d9;
$custom-light: #88c9e4;
$custom-dark: #000000;

JSON

{
  "hex": "#40b3d9",
  "rgb": {
    "r": 64,
    "g": 179,
    "b": 217
  },
  "hsl": {
    "h": 194.902,
    "s": 66.812,
    "l": 55.098
  },
  "oklch": {
    "l": 0.71823,
    "c": 0.11458,
    "h": 224
  },
  "luminance": 0.3834
}

Semantic roles & 50–950 ramp

primary

#40B3D9

secondary

#DAAA9A

accent

#693EEA

background

#F9FCFD

surface

#F1F8FB

border

#CBD1D4

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #40B3D9

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

Preview Lab → · Contrast checker → · Palette generator →