#638BF3#638BF3

#638BF3 is a light, vivid blue. Relative luminance 0.276; OKLCH L 65.7% C 0.161 H 266.2°. Best body text is #000000 at 6.52:1 contrast (WCAG AA passes).

Color values

HEX	#638BF3
RGB	rgb(99, 139, 243)
HSL	hsl(223, 86%, 67%)
HSV	hsv(223, 59%, 95%)
CMYK	cmyk(59.3%, 42.8%, 0%, 4.7%)
CIE-LAB	lab(59.51, 17.01, -56.45)
CIE-LCH	lch(59.51, 58.96, 286.77°)
OKLab	oklab(65.69% -0.0106 -0.1608)
OKLCH	oklch(65.69% 0.161 266.2)
XYZ	xyz(30.5504, 27.5864, 88.4914)
Luminance	0.2759 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638BF3 #F3CB63

analogous

#63D3F3 #638BF3 #8363F3

triadic

#638BF3 #F3638B #8BF363

tetradic

#638BF3 #F363D3 #F3CB63 #63F383

square

#638BF3 #F363D3 #F3CB63 #63F383

split-complementary

#638BF3 #F38363 #D3F363

monochromatic

#1044CC #2A61EF #638BF3 #9CB5F7 #D5E0FC

Accessibility & contrast

On white

3.22

#638BF3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.52

#638BF3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638BF3

6.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638BF3	#FFFFFF	#000000	##000000
##638BF3	1.00	3.22	6.52	6.52
#FFFFFF	3.22	1.00	21.00	21.00
#000000	6.52	21.00	1.00	1.00
##000000	6.52	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C96F7

Deuteranopia (green-blind)

#4789F1

Tritanopia (blue-blind)

#00A2B3

Achromatopsia (no color)

#8F8F8F

Design tokens & code

CSS

--color: #638bf3;
/* rgb */ color: rgb(99, 139, 243);
/* oklch */ color: oklch(65.7% 0.161 266.2);

Tailwind

colors: {
  custom: {
    50: '#9aacf7',
    500: '#638bf3',
    950: '#000000',
  },
}

SCSS

$custom: #638bf3;
$custom-light: #9aacf7;
$custom-dark: #000000;

JSON

{
  "hex": "#638bf3",
  "rgb": {
    "r": 99,
    "g": 139,
    "b": 243
  },
  "hsl": {
    "h": 223.333,
    "s": 85.714,
    "l": 67.059
  },
  "oklch": {
    "l": 0.65689,
    "c": 0.16116,
    "h": 266.2
  },
  "luminance": 0.27589
}

Semantic roles & 50–950 ramp

primary

#638BF3

secondary

#F0E3C2

accent

#A403E2

background

#FAFAFF

surface

#F4F4FF

border

#CECED7

text

#0F1017

muted

#7F7F85

Preview Lab

Preview with #638BF3

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

Preview Lab → · Contrast checker → · Palette generator →