#638AAA#638AAA

#638AAA is a mid, moderate cyan. Relative luminance 0.237; OKLCH L 61.7% C 0.065 H 243.9°. Best body text is #000000 at 5.75:1 contrast (WCAG AA passes).

Color values

HEX	#638AAA
RGB	rgb(99, 138, 170)
HSL	hsl(207, 29%, 53%)
HSV	hsv(207, 42%, 67%)
CMYK	cmyk(41.8%, 18.8%, 0%, 33.3%)
CIE-LAB	lab(55.82, -4.96, -21.15)
CIE-LCH	lch(55.82, 21.73, 256.79°)
OKLab	oklab(61.69% -0.0287 -0.0585)
OKLCH	oklch(61.69% 0.065 243.9)
XYZ	xyz(21.4874, 23.7306, 41.4706)
Luminance	0.2373 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638AAA #AA8363

analogous

#63AAA6 #638AAA #6366AA

triadic

#638AAA #AA638A #8AAA63

tetradic

#638AAA #A663AA #AA8363 #66AA63

square

#638AAA #A663AA #AA8363 #66AA63

split-complementary

#638AAA #AA6366 #AAA663

monochromatic

#344B5F #496B87 #638AAA #8BA8C0 #B2C5D5

Accessibility & contrast

On white

3.65

#638AAA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.75

#638AAA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638AAA

5.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638AAA	#FFFFFF	#000000	##000000
##638AAA	1.00	3.65	5.75	5.75
#FFFFFF	3.65	1.00	21.00	21.00
#000000	5.75	21.00	1.00	1.00
##000000	5.75	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7D8AAC

Deuteranopia (green-blind)

#7382A9

Tritanopia (blue-blind)

#489295

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #638aaa;
/* rgb */ color: rgb(99, 138, 170);
/* oklch */ color: oklch(61.7% 0.065 243.9);

Tailwind

colors: {
  custom: {
    50: '#92acc3',
    500: '#638aaa',
    950: '#000000',
  },
}

SCSS

$custom: #638aaa;
$custom-light: #92acc3;
$custom-dark: #000000;

JSON

{
  "hex": "#638aaa",
  "rgb": {
    "r": 99,
    "g": 138,
    "b": 170
  },
  "hsl": {
    "h": 207.042,
    "s": 29.461,
    "l": 52.745
  },
  "oklch": {
    "l": 0.61692,
    "c": 0.06522,
    "h": 243.9
  },
  "luminance": 0.23732
}

Semantic roles & 50–950 ramp

primary

#638AAA

secondary

#C4B3A5

accent

#8F62C6

background

#F9FAFC

surface

#F1F4F8

border

#CBCED1

text

#0D1012

muted

#7E7F81

Preview Lab

Preview with #638AAA

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

Preview Lab → · Contrast checker → · Palette generator →