#4251D3#4251D3

#4251D3 is a mid, vivid blue. Relative luminance 0.117; OKLCH L 50.4% C 0.198 H 272.1°. Best body text is #FFFFFF at 6.27:1 contrast (WCAG AA passes).

Color values

HEX	#4251D3
RGB	rgb(66, 81, 211)
HSL	hsl(234, 62%, 54%)
HSV	hsv(234, 69%, 83%)
CMYK	cmyk(68.7%, 61.6%, 0%, 17.3%)
CIE-LAB	lab(40.81, 36.54, -68.70)
CIE-LCH	lch(40.81, 77.82, 298.01°)
OKLab	oklab(50.43% 0.0072 -0.1982)
OKLCH	oklch(50.43% 0.198 272.1)
XYZ	xyz(16.9431, 11.7446, 62.9894)
Luminance	0.1175 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4251D3 #D3C442

analogous

#429AD3 #4251D3 #7C42D3

triadic

#4251D3 #D34251 #51D342

tetradic

#4251D3 #D3429A #D3C442 #42D37C

square

#4251D3 #D3429A #D3C442 #42D37C

split-complementary

#4251D3 #D37C42 #9AD342

monochromatic

#1D277D #2937AF #4251D3 #747FDF #A5ACEA

Accessibility & contrast

On white

6.27

#4251D3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.35

#4251D3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4251D3

6.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4251D3	#FFFFFF	#000000	##FFFFFF
##4251D3	1.00	6.27	3.35	6.27
#FFFFFF	6.27	1.00	21.00	1.00
#000000	3.35	21.00	1.00	21.00
##FFFFFF	6.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0067D7

Deuteranopia (green-blind)

#005AD0

Tritanopia (blue-blind)

#00728A

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #4251d3;
/* rgb */ color: rgb(66, 81, 211);
/* oklch */ color: oklch(50.4% 0.198 272.1);

Tailwind

colors: {
  custom: {
    50: '#8882e1',
    500: '#4251d3',
    950: '#000000',
  },
}

SCSS

$custom: #4251d3;
$custom-light: #8882e1;
$custom-dark: #000000;

JSON

{
  "hex": "#4251d3",
  "rgb": {
    "r": 66,
    "g": 81,
    "b": 211
  },
  "hsl": {
    "h": 233.793,
    "s": 62.232,
    "l": 54.314
  },
  "oklch": {
    "l": 0.50425,
    "c": 0.19838,
    "h": 272.1
  },
  "luminance": 0.11746
}

Semantic roles & 50–950 ramp

primary

#4251D3

secondary

#D7D19A

accent

#D442E5

background

#F9F7FD

surface

#F1EEFB

border

#CBC9D4

text

#0D0A15

muted

#7E7C83

Preview Lab

Preview with #4251D3

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

Preview Lab → · Contrast checker → · Palette generator →