#638DF3#638DF3

#638DF3 is a light, vivid blue. Relative luminance 0.282; OKLCH L 66.1% C 0.159 H 265.4°. Best body text is #000000 at 6.63:1 contrast (WCAG AA passes).

Color values

HEX	#638DF3
RGB	rgb(99, 141, 243)
HSL	hsl(223, 86%, 67%)
HSV	hsv(223, 59%, 95%)
CMYK	cmyk(59.3%, 42%, 0%, 4.7%)
CIE-LAB	lab(60.04, 15.82, -55.60)
CIE-LCH	lch(60.04, 57.81, 285.88°)
OKLab	oklab(66.1% -0.0126 -0.1583)
OKLCH	oklch(66.1% 0.159 265.4)
XYZ	xyz(30.8426, 28.1709, 88.5888)
Luminance	0.2817 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638DF3 #F3C963

analogous

#63D5F3 #638DF3 #8163F3

triadic

#638DF3 #F3638D #8DF363

tetradic

#638DF3 #F363D5 #F3C963 #63F381

square

#638DF3 #F363D5 #F3C963 #63F381

split-complementary

#638DF3 #F38163 #D5F363

monochromatic

#1047CC #2A63EF #638DF3 #9CB7F7 #D5E0FC

Accessibility & contrast

On white

3.17

#638DF3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.63

#638DF3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638DF3

6.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638DF3	#FFFFFF	#000000	##000000
##638DF3	1.00	3.17	6.63	6.63
#FFFFFF	3.17	1.00	21.00	21.00
#000000	6.63	21.00	1.00	1.00
##000000	6.63	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6098F7

Deuteranopia (green-blind)

#4B8BF1

Tritanopia (blue-blind)

#00A4B4

Achromatopsia (no color)

#919191

Design tokens & code

CSS

--color: #638df3;
/* rgb */ color: rgb(99, 141, 243);
/* oklch */ color: oklch(66.1% 0.159 265.4);

Tailwind

colors: {
  custom: {
    50: '#9aadf7',
    500: '#638df3',
    950: '#000000',
  },
}

SCSS

$custom: #638df3;
$custom-light: #9aadf7;
$custom-dark: #000000;

JSON

{
  "hex": "#638df3",
  "rgb": {
    "r": 99,
    "g": 141,
    "b": 243
  },
  "hsl": {
    "h": 222.5,
    "s": 85.714,
    "l": 67.059
  },
  "oklch": {
    "l": 0.66096,
    "c": 0.15881,
    "h": 265.4
  },
  "luminance": 0.28173
}

Semantic roles & 50–950 ramp

primary

#638DF3

secondary

#F0E2C2

accent

#A103E2

background

#FAFAFF

surface

#F4F4FF

border

#CECED7

text

#0F1017

muted

#7F7F85

Preview Lab

Preview with #638DF3

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

Preview Lab → · Contrast checker → · Palette generator →