#637DF0#637DF0

#637DF0 is a light, vivid blue. Relative luminance 0.236; OKLCH L 62.7% C 0.174 H 271.0°. Best body text is #000000 at 5.72:1 contrast (WCAG AA passes).

Color values

HEX	#637DF0
RGB	rgb(99, 125, 240)
HSL	hsl(229, 82%, 66%)
HSV	hsv(229, 59%, 94%)
CMYK	cmyk(58.8%, 47.9%, 0%, 5.9%)
CIE-LAB	lab(55.69, 24.46, -60.90)
CIE-LCH	lch(55.69, 65.63, 291.89°)
OKLab	oklab(62.72% 0.0031 -0.174)
OKLCH	oklch(62.72% 0.174 271)
XYZ	xyz(28.2021, 23.6089, 85.4920)
Luminance	0.2361 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637DF0 #F0D663

analogous

#63C4F0 #637DF0 #9063F0

triadic

#637DF0 #F0637D #7DF063

tetradic

#637DF0 #F063C4 #F0D663 #63F090

square

#637DF0 #F063C4 #F0D663 #63F090

split-complementary

#637DF0 #F09063 #C4F063

monochromatic

#1334C6 #2B4EEB #637DF0 #9BACF5 #D3DAFB

Accessibility & contrast

On white

3.67

#637DF0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.72

#637DF0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637DF0

5.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637DF0	#FFFFFF	#000000	##000000
##637DF0	1.00	3.67	5.72	5.72
#FFFFFF	3.67	1.00	21.00	21.00
#000000	5.72	21.00	1.00	1.00
##000000	5.72	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#438CF4

Deuteranopia (green-blind)

#2B80EE

Tritanopia (blue-blind)

#0097AB

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #637df0;
/* rgb */ color: rgb(99, 125, 240);
/* oklch */ color: oklch(62.7% 0.174 271.0);

Tailwind

colors: {
  custom: {
    50: '#9aa2f6',
    500: '#637df0',
    950: '#000000',
  },
}

SCSS

$custom: #637df0;
$custom-light: #9aa2f6;
$custom-dark: #000000;

JSON

{
  "hex": "#637df0",
  "rgb": {
    "r": 99,
    "g": 125,
    "b": 240
  },
  "hsl": {
    "h": 228.936,
    "s": 82.456,
    "l": 66.471
  },
  "oklch": {
    "l": 0.62715,
    "c": 0.17408,
    "h": 271
  },
  "luminance": 0.23611
}

Semantic roles & 50–950 ramp

primary

#637DF0

secondary

#EEE6C1

accent

#B707DF

background

#FAF9FF

surface

#F4F2FE

border

#CECCD6

text

#0F0F17

muted

#7F7E85

Preview Lab

Preview with #637DF0

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

Preview Lab → · Contrast checker → · Palette generator →