#4057D8#4057D8

#4057D8 is a mid, vivid blue. Relative luminance 0.129; OKLCH L 51.8% C 0.198 H 270.2°. Best body text is #FFFFFF at 5.88:1 contrast (WCAG AA passes).

Color values

HEX	#4057D8
RGB	rgb(64, 87, 216)
HSL	hsl(231, 66%, 55%)
HSV	hsv(231, 70%, 85%)
CMYK	cmyk(70.4%, 59.7%, 0%, 15.3%)
CIE-LAB	lab(42.56, 34.28, -68.72)
CIE-LCH	lch(42.56, 76.80, 296.51°)
OKLab	oklab(51.81% 0.0007 -0.1983)
OKLCH	oklch(51.81% 0.198 270.2)
XYZ	xyz(17.9130, 12.8624, 66.4911)
Luminance	0.1286 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4057D8 #D8C140

analogous

#40A3D8 #4057D8 #7540D8

triadic

#4057D8 #D84057 #57D840

tetradic

#4057D8 #D840A3 #D8C140 #40D875

square

#4057D8 #D840A3 #D8C140 #40D875

split-complementary

#4057D8 #D87540 #A3D840

monochromatic

#1B2A83 #253BB6 #4057D8 #7384E2 #A6B0ED

Accessibility & contrast

On white

5.88

#4057D8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.57

#4057D8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4057D8

5.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4057D8	#FFFFFF	#000000	##FFFFFF
##4057D8	1.00	5.88	3.57	5.88
#FFFFFF	5.88	1.00	21.00	1.00
#000000	3.57	21.00	1.00	21.00
##FFFFFF	5.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006CDC

Deuteranopia (green-blind)

#005ED5

Tritanopia (blue-blind)

#00778F

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #4057d8;
/* rgb */ color: rgb(64, 87, 216);
/* oklch */ color: oklch(51.8% 0.198 270.2);

Tailwind

colors: {
  custom: {
    50: '#8886e5',
    500: '#4057d8',
    950: '#000000',
  },
}

SCSS

$custom: #4057d8;
$custom-light: #8886e5;
$custom-dark: #000000;

JSON

{
  "hex": "#4057d8",
  "rgb": {
    "r": 64,
    "g": 87,
    "b": 216
  },
  "hsl": {
    "h": 230.921,
    "s": 66.087,
    "l": 54.902
  },
  "oklch": {
    "l": 0.51813,
    "c": 0.19829,
    "h": 270.2
  },
  "luminance": 0.12864
}

Semantic roles & 50–950 ramp

primary

#4057D8

secondary

#DAD09A

accent

#CF3FE9

background

#F9F8FE

surface

#F1EFFC

border

#CBCAD5

text

#0D0B16

muted

#7E7C84

Preview Lab

Preview with #4057D8

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

Preview Lab → · Contrast checker → · Palette generator →