#637ECE#637ECE

#637ECE is a mid, vivid blue. Relative luminance 0.220; OKLCH L 60.8% C 0.126 H 268.4°. Best body text is #000000 at 5.41:1 contrast (WCAG AA passes).

Color values

HEX	#637ECE
RGB	rgb(99, 126, 206)
HSL	hsl(225, 52%, 60%)
HSV	hsv(225, 52%, 81%)
CMYK	cmyk(51.9%, 38.8%, 0%, 19.2%)
CIE-LAB	lab(54.06, 12.93, -44.43)
CIE-LCH	lch(54.06, 46.27, 286.22°)
OKLab	oklab(60.85% -0.0035 -0.1257)
OKLCH	oklch(60.85% 0.126 268.4)
XYZ	xyz(23.7434, 22.0290, 61.3814)
Luminance	0.2203 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637ECE #CEB363

analogous

#63B3CE #637ECE #7E63CE

triadic

#637ECE #CE637E #7ECE63

tetradic

#637ECE #CE63B3 #CEB363 #63CE7E

square

#637ECE #CE63B3 #CEB363 #63CE7E

split-complementary

#637ECE #CE7E63 #B3CE63

monochromatic

#2C448B #3A5ABA #637ECE #92A5DD #C0CBEB

Accessibility & contrast

On white

3.88

#637ECE on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.41

#637ECE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637ECE

5.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637ECE	#FFFFFF	#000000	##000000
##637ECE	1.00	3.88	5.41	5.41
#FFFFFF	3.88	1.00	21.00	21.00
#000000	5.41	21.00	1.00	1.00
##000000	5.41	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5E86D1

Deuteranopia (green-blind)

#527DCC

Tritanopia (blue-blind)

#318F9C

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #637ece;
/* rgb */ color: rgb(99, 126, 206);
/* oklch */ color: oklch(60.8% 0.126 268.4);

Tailwind

colors: {
  custom: {
    50: '#96a3dd',
    500: '#637ece',
    950: '#000000',
  },
}

SCSS

$custom: #637ece;
$custom-light: #96a3dd;
$custom-dark: #000000;

JSON

{
  "hex": "#637ece",
  "rgb": {
    "r": 99,
    "g": 126,
    "b": 206
  },
  "hsl": {
    "h": 224.86,
    "s": 52.195,
    "l": 59.804
  },
  "oklch": {
    "l": 0.60848,
    "c": 0.12578,
    "h": 268.4
  },
  "luminance": 0.22031
}

Semantic roles & 50–950 ramp

primary

#637ECE

secondary

#DBD1B2

accent

#B74CDC

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0E0F15

muted

#7E7E83

Preview Lab

Preview with #637ECE

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

Preview Lab → · Contrast checker → · Palette generator →