#4257C4#4257C4

#4257C4 is a mid, vivid blue. Relative luminance 0.120; OKLCH L 50.3% C 0.171 H 270.8°. Best body text is #FFFFFF at 6.19:1 contrast (WCAG AA passes).

Color values

HEX	#4257C4
RGB	rgb(66, 87, 196)
HSL	hsl(230, 52%, 51%)
HSV	hsv(230, 66%, 77%)
CMYK	cmyk(66.3%, 55.6%, 0%, 23.1%)
CIE-LAB	lab(41.15, 27.51, -59.48)
CIE-LCH	lch(41.15, 65.53, 294.82°)
OKLab	oklab(50.32% 0.0023 -0.1711)
OKLCH	oklch(50.32% 0.171 270.8)
XYZ	xyz(15.6154, 11.9587, 53.6992)
Luminance	0.1196 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4257C4 #C4AF42

analogous

#4298C4 #4257C4 #6E42C4

triadic

#4257C4 #C44257 #57C442

tetradic

#4257C4 #C44298 #C4AF42 #42C46E

square

#4257C4 #C44298 #C4AF42 #42C46E

split-complementary

#4257C4 #C46E42 #98C442

monochromatic

#212D6A #304199 #4257C4 #7180D3 #9FAAE1

Accessibility & contrast

On white

6.19

#4257C4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.39

#4257C4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4257C4

6.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4257C4	#FFFFFF	#000000	##FFFFFF
##4257C4	1.00	6.19	3.39	6.19
#FFFFFF	6.19	1.00	21.00	1.00
#000000	3.39	21.00	1.00	21.00
##FFFFFF	6.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0067C8

Deuteranopia (green-blind)

#005BC2

Tritanopia (blue-blind)

#007185

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #4257c4;
/* rgb */ color: rgb(66, 87, 196);
/* oklch */ color: oklch(50.3% 0.171 270.8);

Tailwind

colors: {
  custom: {
    50: '#8586d7',
    500: '#4257c4',
    950: '#000000',
  },
}

SCSS

$custom: #4257c4;
$custom-light: #8586d7;
$custom-dark: #000000;

JSON

{
  "hex": "#4257c4",
  "rgb": {
    "r": 66,
    "g": 87,
    "b": 196
  },
  "hsl": {
    "h": 230.308,
    "s": 52.419,
    "l": 51.373
  },
  "oklch": {
    "l": 0.5032,
    "c": 0.1711,
    "h": 270.8
  },
  "luminance": 0.1196
}

Semantic roles & 50–950 ramp

primary

#4257C4

secondary

#CEC494

accent

#C54CDC

background

#F8F8FD

surface

#F0EFFA

border

#CBCAD3

text

#0C0B14

muted

#7D7C83

Preview Lab

Preview with #4257C4

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

Preview Lab → · Contrast checker → · Palette generator →