#0451FF#0451FF

#0451FF is a mid, highly saturated blue. Relative luminance 0.131; OKLCH L 52.7% C 0.264 H 263.1°. Best body text is #FFFFFF at 5.79:1 contrast (WCAG AA passes).

Color values

HEX	#0451FF
RGB	rgb(4, 81, 255)
HSL	hsl(222, 100%, 51%)
HSV	hsv(222, 98%, 100%)
CMYK	cmyk(98.4%, 68.2%, 0%, 0%)
CIE-LAB	lab(42.96, 48.33, -90.14)
CIE-LCH	lch(42.96, 102.28, 298.20°)
OKLab	oklab(52.7% -0.0315 -0.2616)
OKLCH	oklch(52.7% 0.264 263.1)
XYZ	xyz(21.0361, 13.1278, 96.0135)
Luminance	0.1313 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0451FF #FFB204

analogous

#04CEFF #0451FF #3504FF

triadic

#0451FF #FF0451 #51FF04

tetradic

#0451FF #FF04CE #FFB204 #04FF35

square

#0451FF #FF04CE #FFB204 #04FF35

split-complementary

#0451FF #FF3504 #CEFF04

monochromatic

#002A89 #003DC6 #0451FF #417BFF #7EA6FF

Accessibility & contrast

On white

5.79

#0451FF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.63

#0451FF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #0451FF

5.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0451FF	#FFFFFF	#000000	##FFFFFF
##0451FF	1.00	5.79	3.63	5.79
#FFFFFF	5.79	1.00	21.00	1.00
#000000	3.63	21.00	1.00	21.00
##FFFFFF	5.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0071FF

Deuteranopia (green-blind)

#005AFC

Tritanopia (blue-blind)

#0082A2

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #0451ff;
/* rgb */ color: rgb(4, 81, 255);
/* oklch */ color: oklch(52.7% 0.264 263.1);

Tailwind

colors: {
  custom: {
    50: '#8582ff',
    500: '#0451ff',
    950: '#000000',
  },
}

SCSS

$custom: #0451ff;
$custom-light: #8582ff;
$custom-dark: #000000;

JSON

{
  "hex": "#0451ff",
  "rgb": {
    "r": 4,
    "g": 81,
    "b": 255
  },
  "hsl": {
    "h": 221.594,
    "s": 100,
    "l": 50.784
  },
  "oklch": {
    "l": 0.52696,
    "c": 0.26353,
    "h": 263.1
  },
  "luminance": 0.13131
}

Semantic roles & 50–950 ramp

primary

#0451FF

secondary

#E7C578

accent

#BD29FF

background

#F9F7FF

surface

#F2EEFF

border

#CCC9D7

text

#0E0A18

muted

#7E7C86

Preview Lab

Preview with #0451FF

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

Preview Lab → · Contrast checker → · Palette generator →