#4057D7#4057D7

#4057D7 is a mid, vivid blue. Relative luminance 0.128; OKLCH L 51.7% C 0.197 H 270.2°. Best body text is #FFFFFF at 5.89:1 contrast (WCAG AA passes).

Color values

HEX	#4057D7
RGB	rgb(64, 87, 215)
HSL	hsl(231, 65%, 55%)
HSV	hsv(231, 70%, 84%)
CMYK	cmyk(70.2%, 59.5%, 0%, 15.7%)
CIE-LAB	lab(42.48, 33.92, -68.28)
CIE-LCH	lch(42.48, 76.24, 296.42°)
OKLab	oklab(51.73% 0.0007 -0.197)
OKLCH	oklch(51.73% 0.197 270.2)
XYZ	xyz(17.7841, 12.8109, 65.8123)
Luminance	0.1281 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4057D7 #D7C040

analogous

#40A3D7 #4057D7 #7540D7

triadic

#4057D7 #D74057 #57D740

tetradic

#4057D7 #D740A3 #D7C040 #40D775

square

#4057D7 #D740A3 #D7C040 #40D775

split-complementary

#4057D7 #D77540 #A3D740

monochromatic

#1B2B81 #263BB4 #4057D7 #7384E2 #A5B0EC

Accessibility & contrast

On white

5.89

#4057D7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.56

#4057D7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4057D7

5.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4057D7	#FFFFFF	#000000	##FFFFFF
##4057D7	1.00	5.89	3.56	5.89
#FFFFFF	5.89	1.00	21.00	1.00
#000000	3.56	21.00	1.00	21.00
##FFFFFF	5.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006BDB

Deuteranopia (green-blind)

#005DD5

Tritanopia (blue-blind)

#00778F

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #4057d7;
/* rgb */ color: rgb(64, 87, 215);
/* oklch */ color: oklch(51.7% 0.197 270.2);

Tailwind

colors: {
  custom: {
    50: '#8886e4',
    500: '#4057d7',
    950: '#000000',
  },
}

SCSS

$custom: #4057d7;
$custom-light: #8886e4;
$custom-dark: #000000;

JSON

{
  "hex": "#4057d7",
  "rgb": {
    "r": 64,
    "g": 87,
    "b": 215
  },
  "hsl": {
    "h": 230.861,
    "s": 65.368,
    "l": 54.706
  },
  "oklch": {
    "l": 0.51731,
    "c": 0.19699,
    "h": 270.2
  },
  "luminance": 0.12813
}

Semantic roles & 50–950 ramp

primary

#4057D7

secondary

#D9D09A

accent

#CF3FE8

background

#F9F8FE

surface

#F1EFFC

border

#CBCAD5

text

#0D0B16

muted

#7E7C84

Preview Lab

Preview with #4057D7

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

Preview Lab → · Contrast checker → · Palette generator →