#4257A2#4257A2

#4257A2 is a mid, vivid blue. Relative luminance 0.106; OKLCH L 47.9% C 0.123 H 269.5°. Best body text is #FFFFFF at 6.74:1 contrast (WCAG AA passes).

Color values

HEX	#4257A2
RGB	rgb(66, 87, 162)
HSL	hsl(227, 42%, 45%)
HSV	hsv(227, 59%, 64%)
CMYK	cmyk(59.3%, 46.3%, 0%, 36.5%)
CIE-LAB	lab(38.87, 15.54, -43.15)
CIE-LCH	lch(38.87, 45.87, 289.81°)
OKLab	oklab(47.87% -0.001 -0.123)
OKLCH	oklch(47.87% 0.123 269.5)
XYZ	xyz(12.1744, 10.5823, 35.5765)
Luminance	0.1058 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4257A2 #A28D42

analogous

#4287A2 #4257A2 #5D42A2

triadic

#4257A2 #A24257 #57A242

tetradic

#4257A2 #A24287 #A28D42 #42A25D

square

#4257A2 #A24287 #A28D42 #42A25D

split-complementary

#4257A2 #A25D42 #87A242

monochromatic

#1F284B #304077 #4257A2 #6276BF #8E9CD1

Accessibility & contrast

On white

6.74

#4257A2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.12

#4257A2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4257A2

6.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4257A2	#FFFFFF	#000000	##FFFFFF
##4257A2	1.00	6.74	3.12	6.74
#FFFFFF	6.74	1.00	21.00	1.00
#000000	3.12	21.00	1.00	21.00
##FFFFFF	6.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3460A5

Deuteranopia (green-blind)

#2658A0

Tritanopia (blue-blind)

#006874

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #4257a2;
/* rgb */ color: rgb(66, 87, 162);
/* oklch */ color: oklch(47.9% 0.123 269.5);

Tailwind

colors: {
  custom: {
    50: '#7f86be',
    500: '#4257a2',
    950: '#000000',
  },
}

SCSS

$custom: #4257a2;
$custom-light: #7f86be;
$custom-dark: #000000;

JSON

{
  "hex": "#4257a2",
  "rgb": {
    "r": 66,
    "g": 87,
    "b": 162
  },
  "hsl": {
    "h": 226.875,
    "s": 42.105,
    "l": 44.706
  },
  "oklch": {
    "l": 0.47865,
    "c": 0.12305,
    "h": 269.5
  },
  "luminance": 0.10583
}

Semantic roles & 50–950 ramp

primary

#4257A2

secondary

#BCB084

accent

#B756D2

background

#F8F8FB

surface

#EFEFF7

border

#CACAD0

text

#0B0B12

muted

#7C7C81

Preview Lab

Preview with #4257A2

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

Preview Lab → · Contrast checker → · Palette generator →