Red (survey)#E50000

#E50000 is a mid, highly saturated red. Relative luminance 0.167; OKLCH L 57.9% C 0.238 H 29.2°. Best body text is #FFFFFF at 4.85:1 contrast (WCAG AA passes).

Red (survey) — editorial page

Color values

HEX	#E50000
RGB	rgb(229, 0, 0)
HSL	hsl(0, 100%, 45%)
HSV	hsv(0, 100%, 90%)
CMYK	cmyk(0%, 100%, 100%, 10.2%)
CIE-LAB	lab(47.83, 73.84, 61.95)
CIE-LCH	lch(47.83, 96.39, 40.00°)
OKLab	oklab(57.89% 0.2073 0.116)
OKLCH	oklch(57.89% 0.238 29.2)
XYZ	xyz(32.3175, 16.6637, 1.5149)
Luminance	0.1666 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#E50000 #00E5E5

analogous

#E50073 #E50000 #E57300

triadic

#E50000 #00E500 #0000E5

tetradic

#E50000 #73E500 #00E5E5 #7300E5

square

#E50000 #73E500 #00E5E5 #7300E5

split-complementary

#E50000 #00E573 #0073E5

monochromatic

#6B0000 #A80000 #E50000 #FF2323 #FF6060

Accessibility & contrast

On white

4.85

#E50000 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.33

#E50000 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #E50000

4.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##E50000	#FFFFFF	#000000	##FFFFFF
##E50000	1.00	4.85	4.33	4.85
#FFFFFF	4.85	1.00	21.00	1.00
#000000	4.33	21.00	1.00	21.00
##FFFFFF	4.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#615400

Deuteranopia (green-blind)

#928100

Tritanopia (blue-blind)

#FD000C

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #e50000;
/* rgb */ color: rgb(229, 0, 0);
/* oklch */ color: oklch(57.9% 0.238 29.2);

Tailwind

colors: {
  custom: {
    50: '#fa6e4f',
    500: '#e50000',
    950: '#000000',
  },
}

SCSS

$custom: #e50000;
$custom-light: #fa6e4f;
$custom-dark: #000000;

JSON

{
  "hex": "#e50000",
  "rgb": {
    "r": 229,
    "g": 0,
    "b": 0
  },
  "hsl": {
    "h": 0,
    "s": 100,
    "l": 44.902
  },
  "oklch": {
    "l": 0.57892,
    "c": 0.23756,
    "h": 29.2
  },
  "luminance": 0.16658
}

Semantic roles & 50–950 ramp

primary

#E50000

secondary

#5EE3E3

accent

#FFFF29

background

#FFF7F4

surface

#FFEDE7

border

#D7C8C3

text

#1A0902

muted

#877B78

Preview Lab

Preview with #E50000

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

Preview Lab → · Contrast checker → · Palette generator →