#637DFA#637DFA

#637DFA is a light, vivid blue. Relative luminance 0.242; OKLCH L 63.4% C 0.188 H 271.3°. Best body text is #000000 at 5.84:1 contrast (WCAG AA passes).

Color values

HEX	#637DFA
RGB	rgb(99, 125, 250)
HSL	hsl(230, 94%, 68%)
HSV	hsv(230, 60%, 98%)
CMYK	cmyk(60.4%, 50%, 0%, 2%)
CIE-LAB	lab(56.31, 27.74, -65.45)
CIE-LCH	lch(56.31, 71.09, 292.96°)
OKLab	oklab(63.38% 0.0042 -0.1874)
OKLCH	oklch(63.38% 0.188 271.3)
XYZ	xyz(29.7288, 24.2195, 93.5321)
Luminance	0.2422 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637DFA #FAE063

analogous

#63C8FA #637DFA #9463FA

triadic

#637DFA #FA637D #7DFA63

tetradic

#637DFA #FA63C8 #FAE063 #63FA94

square

#637DFA #FA63C8 #FAE063 #63FA94

split-complementary

#637DFA #FA9463 #C8FA63

monochromatic

#072CDC #284CF8 #637DFA #9EAEFC #DAE0FE

Accessibility & contrast

On white

3.59

#637DFA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.84

#637DFA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637DFA

5.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637DFA	#FFFFFF	#000000	##000000
##637DFA	1.00	3.59	5.84	5.84
#FFFFFF	3.59	1.00	21.00	21.00
#000000	5.84	21.00	1.00	1.00
##000000	5.84	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#388EFE

Deuteranopia (green-blind)

#0E81F7

Tritanopia (blue-blind)

#009AB0

Achromatopsia (no color)

#878787

Design tokens & code

CSS

--color: #637dfa;
/* rgb */ color: rgb(99, 125, 250);
/* oklch */ color: oklch(63.4% 0.188 271.3);

Tailwind

colors: {
  custom: {
    50: '#9ca2fd',
    500: '#637dfa',
    950: '#000000',
  },
}

SCSS

$custom: #637dfa;
$custom-light: #9ca2fd;
$custom-dark: #000000;

JSON

{
  "hex": "#637dfa",
  "rgb": {
    "r": 99,
    "g": 125,
    "b": 250
  },
  "hsl": {
    "h": 229.669,
    "s": 93.789,
    "l": 68.431
  },
  "oklch": {
    "l": 0.63377,
    "c": 0.1875,
    "h": 271.3
  },
  "luminance": 0.24222
}

Semantic roles & 50–950 ramp

primary

#637DFA

secondary

#F3EBC6

accent

#BE00E6

background

#FAF9FF

surface

#F4F2FF

border

#CECCD7

text

#0F0F18

muted

#7F7E86

Preview Lab

Preview with #637DFA

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

Preview Lab → · Contrast checker → · Palette generator →