#40BFDB#40BFDB

#40BFDB is a light, moderate cyan. Relative luminance 0.435; OKLCH L 74.7% C 0.115 H 215.7°. Best body text is #000000 at 9.69:1 contrast (WCAG AA passes).

Color values

HEX	#40BFDB
RGB	rgb(64, 191, 219)
HSL	hsl(191, 68%, 55%)
HSV	hsv(191, 71%, 86%)
CMYK	cmyk(70.8%, 12.8%, 0%, 14.1%)
CIE-LAB	lab(71.87, -25.46, -24.05)
CIE-LCH	lch(71.87, 35.02, 223.37°)
OKLab	oklab(74.74% -0.0934 -0.067)
OKLCH	oklch(74.74% 0.115 215.7)
XYZ	xyz(33.5260, 43.4622, 73.6262)
Luminance	0.4347 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40BFDB #DB5C40

analogous

#40DBAA #40BFDB #4071DB

triadic

#40BFDB #DB40BF #BFDB40

tetradic

#40BFDB #AA40DB #DB5C40 #71DB40

square

#40BFDB #AA40DB #DB5C40 #71DB40

split-complementary

#40BFDB #DB4071 #DBAA40

monochromatic

#197387 #239FBB #40BFDB #73D0E5 #A7E2EE

Accessibility & contrast

On white

2.17

#40BFDB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.69

#40BFDB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #40BFDB

9.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40BFDB	#FFFFFF	#000000	##000000
##40BFDB	1.00	2.17	9.69	9.69
#FFFFFF	2.17	1.00	21.00	21.00
#000000	9.69	21.00	1.00	1.00
##000000	9.69	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#ACB9DD

Deuteranopia (green-blind)

#96A9DB

Tritanopia (blue-blind)

#00C9C8

Achromatopsia (no color)

#B0B0B0

Design tokens & code

CSS

--color: #40bfdb;
/* rgb */ color: rgb(64, 191, 219);
/* oklch */ color: oklch(74.7% 0.115 215.7);

Tailwind

colors: {
  custom: {
    50: '#89d2e6',
    500: '#40bfdb',
    950: '#000000',
  },
}

SCSS

$custom: #40bfdb;
$custom-light: #89d2e6;
$custom-dark: #000000;

JSON

{
  "hex": "#40bfdb",
  "rgb": {
    "r": 64,
    "g": 191,
    "b": 219
  },
  "hsl": {
    "h": 190.839,
    "s": 68.282,
    "l": 55.49
  },
  "oklch": {
    "l": 0.74737,
    "c": 0.11493,
    "h": 215.7
  },
  "luminance": 0.43466
}

Semantic roles & 50–950 ramp

primary

#40BFDB

secondary

#DCA79B

accent

#5C3DEB

background

#F9FCFE

surface

#F1F9FC

border

#CBD2D5

text

#0D1416

muted

#7E8284

Preview Lab

Preview with #40BFDB

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

Preview Lab → · Contrast checker → · Palette generator →