#4057D9#4057D9

#4057D9 is a mid, vivid blue. Relative luminance 0.129; OKLCH L 51.9% C 0.200 H 270.2°. Best body text is #FFFFFF at 5.86:1 contrast (WCAG AA passes).

Color values

HEX	#4057D9
RGB	rgb(64, 87, 217)
HSL	hsl(231, 67%, 55%)
HSV	hsv(231, 71%, 85%)
CMYK	cmyk(70.5%, 59.9%, 0%, 14.9%)
CIE-LAB	lab(42.63, 34.63, -69.17)
CIE-LCH	lch(42.63, 77.35, 296.59°)
OKLab	oklab(51.9% 0.0007 -0.1996)
OKLCH	oklch(51.9% 0.2 270.2)
XYZ	xyz(18.0427, 12.9143, 67.1740)
Luminance	0.1292 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4057D9 #D9C240

analogous

#40A4D9 #4057D9 #7540D9

triadic

#4057D9 #D94057 #57D940

tetradic

#4057D9 #D940A4 #D9C240 #40D975

square

#4057D9 #D940A4 #D9C240 #40D975

split-complementary

#4057D9 #D97540 #A4D940

monochromatic

#1A2A84 #243BB7 #4057D9 #7384E3 #A6B1ED

Accessibility & contrast

On white

5.86

#4057D9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.58

#4057D9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4057D9

5.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4057D9	#FFFFFF	#000000	##FFFFFF
##4057D9	1.00	5.86	3.58	5.86
#FFFFFF	5.86	1.00	21.00	1.00
#000000	3.58	21.00	1.00	21.00
##FFFFFF	5.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006CDD

Deuteranopia (green-blind)

#005ED6

Tritanopia (blue-blind)

#007890

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #4057d9;
/* rgb */ color: rgb(64, 87, 217);
/* oklch */ color: oklch(51.9% 0.200 270.2);

Tailwind

colors: {
  custom: {
    50: '#8886e6',
    500: '#4057d9',
    950: '#000000',
  },
}

SCSS

$custom: #4057d9;
$custom-light: #8886e6;
$custom-dark: #000000;

JSON

{
  "hex": "#4057d9",
  "rgb": {
    "r": 64,
    "g": 87,
    "b": 217
  },
  "hsl": {
    "h": 230.98,
    "s": 66.812,
    "l": 55.098
  },
  "oklch": {
    "l": 0.51896,
    "c": 0.19959,
    "h": 270.2
  },
  "luminance": 0.12916
}

Semantic roles & 50–950 ramp

primary

#4057D9

secondary

#DAD19A

accent

#D03EEA

background

#F9F8FE

surface

#F1EFFC

border

#CBCAD5

text

#0D0B16

muted

#7E7C84

Preview Lab

Preview with #4057D9

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

Preview Lab → · Contrast checker → · Palette generator →