#40B5DF#40B5DF

#40B5DF is a light, moderate cyan. Relative luminance 0.395; OKLCH L 72.6% C 0.119 H 226.1°. Best body text is #000000 at 8.89:1 contrast (WCAG AA passes).

Color values

HEX	#40B5DF
RGB	rgb(64, 181, 223)
HSL	hsl(196, 71%, 56%)
HSV	hsv(196, 71%, 87%)
CMYK	cmyk(71.3%, 18.8%, 0%, 12.5%)
CIE-LAB	lab(69.08, -19.08, -30.50)
CIE-LCH	lch(69.08, 35.98, 237.97°)
OKLab	oklab(72.55% -0.0821 -0.0854)
OKLCH	oklch(72.55% 0.119 226.1)
XYZ	xyz(31.9521, 39.4618, 75.7306)
Luminance	0.3947 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40B5DF #DF6A40

analogous

#40DFBA #40B5DF #4066DF

triadic

#40B5DF #DF40B5 #B5DF40

tetradic

#40B5DF #BA40DF #DF6A40 #66DF40

square

#40B5DF #BA40DF #DF6A40 #66DF40

split-complementary

#40B5DF #DF4066 #DFBA40

monochromatic

#186E8D #2097C1 #40B5DF #74C9E8 #A9DEF1

Accessibility & contrast

On white

2.36

#40B5DF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.89

#40B5DF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #40B5DF

8.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40B5DF	#FFFFFF	#000000	##000000
##40B5DF	1.00	2.36	8.89	8.89
#FFFFFF	2.36	1.00	21.00	21.00
#000000	8.89	21.00	1.00	1.00
##000000	8.89	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9EB1E1

Deuteranopia (green-blind)

#89A2DF

Tritanopia (blue-blind)

#00C1C3

Achromatopsia (no color)

#A9A9A9

Design tokens & code

CSS

--color: #40b5df;
/* rgb */ color: rgb(64, 181, 223);
/* oklch */ color: oklch(72.6% 0.119 226.1);

Tailwind

colors: {
  custom: {
    50: '#89cbe9',
    500: '#40b5df',
    950: '#000000',
  },
}

SCSS

$custom: #40b5df;
$custom-light: #89cbe9;
$custom-dark: #000000;

JSON

{
  "hex": "#40b5df",
  "rgb": {
    "r": 64,
    "g": 181,
    "b": 223
  },
  "hsl": {
    "h": 195.849,
    "s": 71.3,
    "l": 56.275
  },
  "oklch": {
    "l": 0.72553,
    "c": 0.11851,
    "h": 226.1
  },
  "luminance": 0.39465
}

Semantic roles & 50–950 ramp

primary

#40B5DF

secondary

#DEAE9D

accent

#693AEE

background

#F9FCFE

surface

#F1F8FC

border

#CBD1D5

text

#0D1316

muted

#7E8284

Preview Lab

Preview with #40B5DF

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

Preview Lab → · Contrast checker → · Palette generator →