#4257BE#4257BE

#4257BE is a mid, vivid blue. Relative luminance 0.117; OKLCH L 49.9% C 0.163 H 270.7°. Best body text is #FFFFFF at 6.29:1 contrast (WCAG AA passes).

Color values

HEX	#4257BE
RGB	rgb(66, 87, 190)
HSL	hsl(230, 49%, 50%)
HSV	hsv(230, 65%, 75%)
CMYK	cmyk(65.3%, 54.2%, 0%, 25.5%)
CIE-LAB	lab(40.72, 25.39, -56.68)
CIE-LCH	lch(40.72, 62.11, 294.13°)
OKLab	oklab(49.86% 0.002 -0.1629)
OKLCH	oklch(49.86% 0.163 270.7)
XYZ	xyz(14.9461, 11.6910, 50.1742)
Luminance	0.1169 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4257BE #BEA942

analogous

#4295BE #4257BE #6B42BE

triadic

#4257BE #BE4257 #57BE42

tetradic

#4257BE #BE4295 #BEA942 #42BE6B

square

#4257BE #BE4295 #BEA942 #42BE6B

split-complementary

#4257BE #BE6B42 #95BE42

monochromatic

#222D63 #324291 #4257BE #707FCE #9DA8DD

Accessibility & contrast

On white

6.29

#4257BE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.34

#4257BE on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4257BE

6.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4257BE	#FFFFFF	#000000	##FFFFFF
##4257BE	1.00	6.29	3.34	6.29
#FFFFFF	6.29	1.00	21.00	1.00
#000000	3.34	21.00	1.00	21.00
##FFFFFF	6.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0A66C2

Deuteranopia (green-blind)

#005BBC

Tritanopia (blue-blind)

#006F82

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #4257be;
/* rgb */ color: rgb(66, 87, 190);
/* oklch */ color: oklch(49.9% 0.163 270.7);

Tailwind

colors: {
  custom: {
    50: '#8486d2',
    500: '#4257be',
    950: '#000000',
  },
}

SCSS

$custom: #4257be;
$custom-light: #8486d2;
$custom-dark: #000000;

JSON

{
  "hex": "#4257be",
  "rgb": {
    "r": 66,
    "g": 87,
    "b": 190
  },
  "hsl": {
    "h": 229.839,
    "s": 48.819,
    "l": 50.196
  },
  "oklch": {
    "l": 0.49862,
    "c": 0.16287,
    "h": 270.7
  },
  "luminance": 0.11692
}

Semantic roles & 50–950 ramp

primary

#4257BE

secondary

#CAC092

accent

#C14FD8

background

#F8F8FD

surface

#F0EFFA

border

#CBCAD3

text

#0C0B14

muted

#7D7C83

Preview Lab

Preview with #4257BE

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

Preview Lab → · Contrast checker → · Palette generator →