#638FF1#638FF1

#638FF1 is a light, vivid blue. Relative luminance 0.286; OKLCH L 66.4% C 0.154 H 264.4°. Best body text is #000000 at 6.73:1 contrast (WCAG AA passes).

Color values

HEX	#638FF1
RGB	rgb(99, 143, 241)
HSL	hsl(221, 84%, 67%)
HSV	hsv(221, 59%, 95%)
CMYK	cmyk(58.9%, 40.7%, 0%, 5.5%)
CIE-LAB	lab(60.47, 13.98, -53.82)
CIE-LCH	lch(60.47, 55.61, 284.56°)
OKLab	oklab(66.39% -0.015 -0.1531)
OKLCH	oklch(66.39% 0.154 264.4)
XYZ	xyz(30.8398, 28.6458, 87.1060)
Luminance	0.2865 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638FF1 #F1C563

analogous

#63D6F1 #638FF1 #7E63F1

triadic

#638FF1 #F1638F #8FF163

tetradic

#638FF1 #F163D6 #F1C563 #63F17E

square

#638FF1 #F163D6 #F1C563 #63F17E

split-complementary

#638FF1 #F17E63 #D6F163

monochromatic

#124AC8 #2B67EC #638FF1 #9BB7F6 #D3E0FB

Accessibility & contrast

On white

3.12

#638FF1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.73

#638FF1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638FF1

6.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638FF1	#FFFFFF	#000000	##000000
##638FF1	1.00	3.12	6.73	6.73
#FFFFFF	3.12	1.00	21.00	21.00
#000000	6.73	21.00	1.00	1.00
##000000	6.73	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6499F5

Deuteranopia (green-blind)

#518CEF

Tritanopia (blue-blind)

#00A5B4

Achromatopsia (no color)

#929292

Design tokens & code

CSS

--color: #638ff1;
/* rgb */ color: rgb(99, 143, 241);
/* oklch */ color: oklch(66.4% 0.154 264.4);

Tailwind

colors: {
  custom: {
    50: '#9aaff6',
    500: '#638ff1',
    950: '#000000',
  },
}

SCSS

$custom: #638ff1;
$custom-light: #9aaff6;
$custom-dark: #000000;

JSON

{
  "hex": "#638ff1",
  "rgb": {
    "r": 99,
    "g": 143,
    "b": 241
  },
  "hsl": {
    "h": 221.408,
    "s": 83.529,
    "l": 66.667
  },
  "oklch": {
    "l": 0.66388,
    "c": 0.15381,
    "h": 264.4
  },
  "luminance": 0.28648
}

Semantic roles & 50–950 ramp

primary

#638FF1

secondary

#EFE1C1

accent

#9C06E0

background

#FAFAFF

surface

#F3F4FE

border

#CDCED6

text

#0F1017

muted

#7F7F85

Preview Lab

Preview with #638FF1

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

Preview Lab → · Contrast checker → · Palette generator →