#638BF1#638BF1

#638BF1 is a light, vivid blue. Relative luminance 0.275; OKLCH L 65.6% C 0.158 H 266.0°. Best body text is #000000 at 6.49:1 contrast (WCAG AA passes).

Color values

HEX	#638BF1
RGB	rgb(99, 139, 241)
HSL	hsl(223, 84%, 67%)
HSV	hsv(223, 59%, 95%)
CMYK	cmyk(58.9%, 42.3%, 0%, 5.5%)
CIE-LAB	lab(59.40, 16.36, -55.52)
CIE-LCH	lch(59.40, 57.88, 286.42°)
OKLab	oklab(65.57% -0.0109 -0.1581)
OKLCH	oklch(65.57% 0.158 266)
XYZ	xyz(30.2500, 27.4662, 86.9094)
Luminance	0.2747 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638BF1 #F1C963

analogous

#63D2F1 #638BF1 #8263F1

triadic

#638BF1 #F1638B #8BF163

tetradic

#638BF1 #F163D2 #F1C963 #63F182

square

#638BF1 #F163D2 #F1C963 #63F182

split-complementary

#638BF1 #F18263 #D2F163

monochromatic

#1245C8 #2B61EC #638BF1 #9BB5F6 #D3DFFB

Accessibility & contrast

On white

3.23

#638BF1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.49

#638BF1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638BF1

6.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638BF1	#FFFFFF	#000000	##000000
##638BF1	1.00	3.23	6.49	6.49
#FFFFFF	3.23	1.00	21.00	21.00
#000000	6.49	21.00	1.00	1.00
##000000	6.49	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D96F5

Deuteranopia (green-blind)

#4989EF

Tritanopia (blue-blind)

#00A2B2

Achromatopsia (no color)

#8F8F8F

Design tokens & code

CSS

--color: #638bf1;
/* rgb */ color: rgb(99, 139, 241);
/* oklch */ color: oklch(65.6% 0.158 266.0);

Tailwind

colors: {
  custom: {
    50: '#9aacf6',
    500: '#638bf1',
    950: '#000000',
  },
}

SCSS

$custom: #638bf1;
$custom-light: #9aacf6;
$custom-dark: #000000;

JSON

{
  "hex": "#638bf1",
  "rgb": {
    "r": 99,
    "g": 139,
    "b": 241
  },
  "hsl": {
    "h": 223.099,
    "s": 83.529,
    "l": 66.667
  },
  "oklch": {
    "l": 0.65569,
    "c": 0.15846,
    "h": 266
  },
  "luminance": 0.27469
}

Semantic roles & 50–950 ramp

primary

#638BF1

secondary

#EFE2C1

accent

#A206E0

background

#FAFAFF

surface

#F3F4FE

border

#CDCED6

text

#0F1017

muted

#7F7F85

Preview Lab

Preview with #638BF1

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

Preview Lab → · Contrast checker → · Palette generator →