#4057AC#4057AC

#4057AC is a mid, vivid blue. Relative luminance 0.109; OKLCH L 48.4% C 0.138 H 269.3°. Best body text is #FFFFFF at 6.61:1 contrast (WCAG AA passes).

Color values

HEX	#4057AC
RGB	rgb(64, 87, 172)
HSL	hsl(227, 46%, 46%)
HSV	hsv(227, 63%, 67%)
CMYK	cmyk(62.8%, 49.4%, 0%, 32.5%)
CIE-LAB	lab(39.38, 18.67, -48.27)
CIE-LCH	lch(39.38, 51.76, 291.14°)
OKLab	oklab(48.43% -0.0017 -0.1381)
OKLCH	oklch(48.43% 0.138 269.3)
XYZ	xyz(12.9664, 10.8838, 40.4392)
Luminance	0.1089 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4057AC #AC9540

analogous

#408DAC #4057AC #5F40AC

triadic

#4057AC #AC4057 #57AC40

tetradic

#4057AC #AC408D #AC9540 #40AC5F

square

#4057AC #AC408D #AC9540 #40AC5F

split-complementary

#4057AC #AC5F40 #8DAC40

monochromatic

#1F2A53 #2F407F #4057AC #6479C5 #919FD6

Accessibility & contrast

On white

6.61

#4057AC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.18

#4057AC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4057AC

6.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4057AC	#FFFFFF	#000000	##FFFFFF
##4057AC	1.00	6.61	3.18	6.61
#FFFFFF	6.61	1.00	21.00	1.00
#000000	3.18	21.00	1.00	21.00
##FFFFFF	6.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A62AF

Deuteranopia (green-blind)

#1458AA

Tritanopia (blue-blind)

#006B79

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #4057ac;
/* rgb */ color: rgb(64, 87, 172);
/* oklch */ color: oklch(48.4% 0.138 269.3);

Tailwind

colors: {
  custom: {
    50: '#7f86c5',
    500: '#4057ac',
    950: '#000000',
  },
}

SCSS

$custom: #4057ac;
$custom-light: #7f86c5;
$custom-dark: #000000;

JSON

{
  "hex": "#4057ac",
  "rgb": {
    "r": 64,
    "g": 87,
    "b": 172
  },
  "hsl": {
    "h": 227.222,
    "s": 45.763,
    "l": 46.275
  },
  "oklch": {
    "l": 0.48431,
    "c": 0.13816,
    "h": 269.3
  },
  "luminance": 0.10885
}

Semantic roles & 50–950 ramp

primary

#4057AC

secondary

#C1B587

accent

#BA52D5

background

#F8F8FC

surface

#EFEFF8

border

#CACAD1

text

#0B0B13

muted

#7C7C82

Preview Lab

Preview with #4057AC

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

Preview Lab → · Contrast checker → · Palette generator →