#4057A3#4057A3

#4057A3 is a mid, vivid blue. Relative luminance 0.106; OKLCH L 47.8% C 0.125 H 268.7°. Best body text is #FFFFFF at 6.75:1 contrast (WCAG AA passes).

Color values

HEX	#4057A3
RGB	rgb(64, 87, 163)
HSL	hsl(226, 44%, 45%)
HSV	hsv(226, 61%, 64%)
CMYK	cmyk(60.7%, 46.6%, 0%, 36.1%)
CIE-LAB	lab(38.81, 15.49, -43.85)
CIE-LCH	lch(38.81, 46.50, 289.45°)
OKLab	oklab(47.81% -0.0029 -0.1251)
OKLCH	oklch(47.81% 0.125 268.7)
XYZ	xyz(12.1312, 10.5497, 36.0402)
Luminance	0.1055 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4057A3 #A38C40

analogous

#4088A3 #4057A3 #5B40A3

triadic

#4057A3 #A34057 #57A340

tetradic

#4057A3 #A34088 #A38C40 #40A35B

square

#4057A3 #A34088 #A38C40 #40A35B

split-complementary

#4057A3 #A35B40 #88A340

monochromatic

#1D284B #2F4077 #4057A3 #6076C0 #8C9CD2

Accessibility & contrast

On white

6.75

#4057A3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.11

#4057A3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4057A3

6.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4057A3	#FFFFFF	#000000	##FFFFFF
##4057A3	1.00	6.75	3.11	6.75
#FFFFFF	6.75	1.00	21.00	1.00
#000000	3.11	21.00	1.00	21.00
##FFFFFF	6.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3360A6

Deuteranopia (green-blind)

#2457A1

Tritanopia (blue-blind)

#006875

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #4057a3;
/* rgb */ color: rgb(64, 87, 163);
/* oklch */ color: oklch(47.8% 0.125 268.7);

Tailwind

colors: {
  custom: {
    50: '#7e86bf',
    500: '#4057a3',
    950: '#000000',
  },
}

SCSS

$custom: #4057a3;
$custom-light: #7e86bf;
$custom-dark: #000000;

JSON

{
  "hex": "#4057a3",
  "rgb": {
    "r": 64,
    "g": 87,
    "b": 163
  },
  "hsl": {
    "h": 226.061,
    "s": 43.612,
    "l": 44.51
  },
  "oklch": {
    "l": 0.4781,
    "c": 0.12516,
    "h": 268.7
  },
  "luminance": 0.10551
}

Semantic roles & 50–950 ramp

primary

#4057A3

secondary

#BDAF82

accent

#B654D3

background

#F8F8FB

surface

#EFEFF7

border

#CACAD0

text

#0B0B12

muted

#7C7C81

Preview Lab

Preview with #4057A3

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

Preview Lab → · Contrast checker → · Palette generator →