#4257BA#4257BA

#4257BA is a mid, vivid blue. Relative luminance 0.115; OKLCH L 49.6% C 0.157 H 270.6°. Best body text is #FFFFFF at 6.36:1 contrast (WCAG AA passes).

Color values

HEX	#4257BA
RGB	rgb(66, 87, 186)
HSL	hsl(230, 48%, 49%)
HSV	hsv(230, 65%, 73%)
CMYK	cmyk(64.5%, 53.2%, 0%, 27.1%)
CIE-LAB	lab(40.44, 23.98, -54.80)
CIE-LCH	lch(40.44, 59.82, 293.63°)
OKLab	oklab(49.56% 0.0017 -0.1573)
OKLCH	oklch(49.56% 0.157 270.6)
XYZ	xyz(14.5149, 11.5185, 47.9032)
Luminance	0.1152 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4257BA #BAA542

analogous

#4293BA #4257BA #6942BA

triadic

#4257BA #BA4257 #57BA42

tetradic

#4257BA #BA4293 #BAA542 #42BA69

square

#4257BA #BA4293 #BAA542 #42BA69

split-complementary

#4257BA #BA6942 #93BA42

monochromatic

#222D60 #32428D #4257BA #6E7ECB #9BA6DB

Accessibility & contrast

On white

6.36

#4257BA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.30

#4257BA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4257BA

6.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4257BA	#FFFFFF	#000000	##FFFFFF
##4257BA	1.00	6.36	3.30	6.36
#FFFFFF	6.36	1.00	21.00	1.00
#000000	3.30	21.00	1.00	21.00
##FFFFFF	6.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1665BD

Deuteranopia (green-blind)

#005AB8

Tritanopia (blue-blind)

#006E80

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #4257ba;
/* rgb */ color: rgb(66, 87, 186);
/* oklch */ color: oklch(49.6% 0.157 270.6);

Tailwind

colors: {
  custom: {
    50: '#8386cf',
    500: '#4257ba',
    950: '#000000',
  },
}

SCSS

$custom: #4257ba;
$custom-light: #8386cf;
$custom-dark: #000000;

JSON

{
  "hex": "#4257ba",
  "rgb": {
    "r": 66,
    "g": 87,
    "b": 186
  },
  "hsl": {
    "h": 229.5,
    "s": 47.619,
    "l": 49.412
  },
  "oklch": {
    "l": 0.49562,
    "c": 0.15733,
    "h": 270.6
  },
  "luminance": 0.1152
}

Semantic roles & 50–950 ramp

primary

#4257BA

secondary

#C8BE90

accent

#C051D7

background

#F8F8FC

surface

#F0EFF9

border

#CBCAD2

text

#0C0B14

muted

#7D7C82

Preview Lab

Preview with #4257BA

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

Preview Lab → · Contrast checker → · Palette generator →