#638BEF#638BEF

#638BEF is a light, vivid blue. Relative luminance 0.274; OKLCH L 65.5% C 0.156 H 265.8°. Best body text is #000000 at 6.47:1 contrast (WCAG AA passes).

Color values

HEX	#638BEF
RGB	rgb(99, 139, 239)
HSL	hsl(223, 81%, 66%)
HSV	hsv(223, 59%, 94%)
CMYK	cmyk(58.6%, 41.8%, 0%, 6.3%)
CIE-LAB	lab(59.29, 15.71, -54.59)
CIE-LCH	lch(59.29, 56.80, 286.06°)
OKLab	oklab(65.45% -0.0113 -0.1553)
OKLCH	oklch(65.45% 0.156 265.8)
XYZ	xyz(29.9529, 27.3474, 85.3447)
Luminance	0.2735 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638BEF #EFC763

analogous

#63D1EF #638BEF #8163EF

triadic

#638BEF #EF638B #8BEF63

tetradic

#638BEF #EF63D1 #EFC763 #63EF81

square

#638BEF #EF63D1 #EFC763 #63EF81

split-complementary

#638BEF #EF8163 #D1EF63

monochromatic

#1446C4 #2B62E9 #638BEF #9BB4F5 #D2DEFA

Accessibility & contrast

On white

3.25

#638BEF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.47

#638BEF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638BEF

6.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638BEF	#FFFFFF	#000000	##000000
##638BEF	1.00	3.25	6.47	6.47
#FFFFFF	3.25	1.00	21.00	21.00
#000000	6.47	21.00	1.00	1.00
##000000	6.47	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5F96F3

Deuteranopia (green-blind)

#4B89ED

Tritanopia (blue-blind)

#00A1B1

Achromatopsia (no color)

#8F8F8F

Design tokens & code

CSS

--color: #638bef;
/* rgb */ color: rgb(99, 139, 239);
/* oklch */ color: oklch(65.5% 0.156 265.8);

Tailwind

colors: {
  custom: {
    50: '#9aacf5',
    500: '#638bef',
    950: '#000000',
  },
}

SCSS

$custom: #638bef;
$custom-light: #9aacf5;
$custom-dark: #000000;

JSON

{
  "hex": "#638bef",
  "rgb": {
    "r": 99,
    "g": 139,
    "b": 239
  },
  "hsl": {
    "h": 222.857,
    "s": 81.395,
    "l": 66.275
  },
  "oklch": {
    "l": 0.6545,
    "c": 0.15576,
    "h": 265.8
  },
  "luminance": 0.2735
}

Semantic roles & 50–950 ramp

primary

#638BEF

secondary

#EEE1C0

accent

#A108DE

background

#FAFAFF

surface

#F3F4FE

border

#CDCED6

text

#0F1017

muted

#7F7F85

Preview Lab

Preview with #638BEF

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

Preview Lab → · Contrast checker → · Palette generator →