#64B5EF#64B5EF

#64B5EF is a light, moderate cyan. Relative luminance 0.420; OKLCH L 74.5% C 0.116 H 241.7°. Best body text is #000000 at 9.40:1 contrast (WCAG AA passes).

Color values

HEX	#64B5EF
RGB	rgb(100, 181, 239)
HSL	hsl(205, 81%, 66%)
HSV	hsv(205, 58%, 94%)
CMYK	cmyk(58.2%, 24.3%, 0%, 6.3%)
CIE-LAB	lab(70.86, -8.16, -36.38)
CIE-LCH	lch(70.86, 37.28, 257.36°)
OKLab	oklab(74.5% -0.0548 -0.102)
OKLCH	oklch(74.5% 0.116 241.7)
XYZ	xyz(37.3536, 41.9856, 87.7802)
Luminance	0.4199 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#64B5EF #EF9E64

analogous

#64EFE4 #64B5EF #6470EF

triadic

#64B5EF #EF64B5 #B5EF64

tetradic

#64B5EF #E464EF #EF9E64 #70EF64

square

#64B5EF #E464EF #EF9E64 #70EF64

split-complementary

#64B5EF #EF6470 #EFE464

monochromatic

#147BC4 #2D9BE9 #64B5EF #9BCFF5 #D3EAFA

Accessibility & contrast

On white

2.23

#64B5EF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.40

#64B5EF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #64B5EF

9.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##64B5EF	#FFFFFF	#000000	##000000
##64B5EF	1.00	2.23	9.40	9.40
#FFFFFF	2.23	1.00	21.00	21.00
#000000	9.40	21.00	1.00	1.00
##000000	9.40	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9BB5F2

Deuteranopia (green-blind)

#88A7EE

Tritanopia (blue-blind)

#00C3C9

Achromatopsia (no color)

#ADADAD

Design tokens & code

CSS

--color: #64b5ef;
/* rgb */ color: rgb(100, 181, 239);
/* oklch */ color: oklch(74.5% 0.116 241.7);

Tailwind

colors: {
  custom: {
    50: '#9acbf4',
    500: '#64b5ef',
    950: '#000000',
  },
}

SCSS

$custom: #64b5ef;
$custom-light: #9acbf4;
$custom-dark: #000000;

JSON

{
  "hex": "#64b5ef",
  "rgb": {
    "r": 100,
    "g": 181,
    "b": 239
  },
  "hsl": {
    "h": 205.036,
    "s": 81.287,
    "l": 66.471
  },
  "oklch": {
    "l": 0.74495,
    "c": 0.11582,
    "h": 241.7
  },
  "luminance": 0.41989
}

Semantic roles & 50–950 ramp

primary

#64B5EF

secondary

#EED4C1

accent

#6108DE

background

#FAFCFE

surface

#F3F8FD

border

#CDD1D5

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #64B5EF

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

Preview Lab → · Contrast checker → · Palette generator →