#4257D9#4257D9

#4257D9 is a mid, vivid blue. Relative luminance 0.130; OKLCH L 52.0% C 0.199 H 270.8°. Best body text is #FFFFFF at 5.84:1 contrast (WCAG AA passes).

Color values

HEX	#4257D9
RGB	rgb(66, 87, 217)
HSL	hsl(232, 67%, 55%)
HSV	hsv(232, 70%, 85%)
CMYK	cmyk(69.6%, 59.9%, 0%, 14.9%)
CIE-LAB	lab(42.74, 34.88, -68.99)
CIE-LCH	lch(42.74, 77.31, 296.82°)
OKLab	oklab(52% 0.0026 -0.199)
OKLCH	oklch(52% 0.199 270.8)
XYZ	xyz(18.1751, 12.9826, 67.1802)
Luminance	0.1298 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4257D9 #D9C442

analogous

#42A2D9 #4257D9 #7942D9

triadic

#4257D9 #D94257 #57D942

tetradic

#4257D9 #D942A2 #D9C442 #42D979

square

#4257D9 #D942A2 #D9C442 #42D979

split-complementary

#4257D9 #D97942 #A2D942

monochromatic

#1B2A86 #253AB9 #4257D9 #7584E3 #A8B2ED

Accessibility & contrast

On white

5.84

#4257D9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.60

#4257D9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4257D9

5.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4257D9	#FFFFFF	#000000	##FFFFFF
##4257D9	1.00	5.84	3.60	5.84
#FFFFFF	5.84	1.00	21.00	1.00
#000000	3.60	21.00	1.00	21.00
##FFFFFF	5.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006CDD

Deuteranopia (green-blind)

#005ED6

Tritanopia (blue-blind)

#007890

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #4257d9;
/* rgb */ color: rgb(66, 87, 217);
/* oklch */ color: oklch(52.0% 0.199 270.8);

Tailwind

colors: {
  custom: {
    50: '#8986e6',
    500: '#4257d9',
    950: '#000000',
  },
}

SCSS

$custom: #4257d9;
$custom-light: #8986e6;
$custom-dark: #000000;

JSON

{
  "hex": "#4257d9",
  "rgb": {
    "r": 66,
    "g": 87,
    "b": 217
  },
  "hsl": {
    "h": 231.656,
    "s": 66.52,
    "l": 55.49
  },
  "oklch": {
    "l": 0.52,
    "c": 0.19906,
    "h": 270.8
  },
  "luminance": 0.12984
}

Semantic roles & 50–950 ramp

primary

#4257D9

secondary

#DBD29C

accent

#D23EE9

background

#F9F8FE

surface

#F1EFFC

border

#CBCAD5

text

#0D0B16

muted

#7E7C84

Preview Lab

Preview with #4257D9

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

Preview Lab → · Contrast checker → · Palette generator →