#40B4CF#40B4CF

#40B4CF is a light, moderate cyan. Relative luminance 0.382; OKLCH L 71.6% C 0.108 H 216.4°. Best body text is #000000 at 8.65:1 contrast (WCAG AA passes).

Color values

HEX	#40B4CF
RGB	rgb(64, 180, 207)
HSL	hsl(191, 60%, 53%)
HSV	hsv(191, 69%, 81%)
CMYK	cmyk(69.1%, 13%, 0%, 18.8%)
CIE-LAB	lab(68.19, -23.63, -23.10)
CIE-LCH	lch(68.19, 33.05, 224.35°)
OKLab	oklab(71.64% -0.0872 -0.0644)
OKLCH	oklch(71.64% 0.108 216.4)
XYZ	xyz(29.6934, 38.2341, 64.8344)
Luminance	0.3824 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40B4CF #CF5B40

analogous

#40CFA3 #40B4CF #406CCF

triadic

#40B4CF #CF40B4 #B4CF40

tetradic

#40B4CF #A340CF #CF5B40 #6CCF40

square

#40B4CF #A340CF #CF5B40 #6CCF40

split-complementary

#40B4CF #CF406C #CFA340

monochromatic

#1E6677 #2A90A8 #40B4CF #71C7DB #A2DAE8

Accessibility & contrast

On white

2.43

#40B4CF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.65

#40B4CF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #40B4CF

8.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40B4CF	#FFFFFF	#000000	##000000
##40B4CF	1.00	2.43	8.65	8.65
#FFFFFF	2.43	1.00	21.00	21.00
#000000	8.65	21.00	1.00	1.00
##000000	8.65	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A2AFD1

Deuteranopia (green-blind)

#8EA0CF

Tritanopia (blue-blind)

#00BEBC

Achromatopsia (no color)

#A6A6A6

Design tokens & code

CSS

--color: #40b4cf;
/* rgb */ color: rgb(64, 180, 207);
/* oklch */ color: oklch(71.6% 0.108 216.4);

Tailwind

colors: {
  custom: {
    50: '#87cadd',
    500: '#40b4cf',
    950: '#000000',
  },
}

SCSS

$custom: #40b4cf;
$custom-light: #87cadd;
$custom-dark: #000000;

JSON

{
  "hex": "#40b4cf",
  "rgb": {
    "r": 64,
    "g": 180,
    "b": 207
  },
  "hsl": {
    "h": 191.329,
    "s": 59.833,
    "l": 53.137
  },
  "oklch": {
    "l": 0.7164,
    "c": 0.10836,
    "h": 216.4
  },
  "luminance": 0.38237
}

Semantic roles & 50–950 ramp

primary

#40B4CF

secondary

#D4A297

accent

#6345E3

background

#F9FCFD

surface

#F1F8FB

border

#CBD1D4

text

#0D1315

muted

#7E8283

Preview Lab

Preview with #40B4CF

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

Preview Lab → · Contrast checker → · Palette generator →