#FF3404#FF3404

#FF3404 is a light, highly saturated red. Relative luminance 0.237; OKLCH L 64.7% C 0.240 H 32.5°. Best body text is #000000 at 5.75:1 contrast (WCAG AA passes).

Color values

HEX	#FF3404
RGB	rgb(255, 52, 4)
HSL	hsl(11, 100%, 51%)
HSV	hsv(11, 98%, 100%)
CMYK	cmyk(0%, 79.6%, 98.4%, 0%)
CIE-LAB	lab(55.82, 72.77, 67.30)
CIE-LCH	lch(55.82, 99.12, 42.76°)
OKLab	oklab(64.71% 0.2025 0.1291)
OKLCH	oklch(64.71% 0.24 32.5)
XYZ	xyz(42.4955, 23.7319, 2.4581)
Luminance	0.2372 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#FF3404 #04CFFF

analogous

#FF0451 #FF3404 #FFB104

triadic

#FF3404 #04FF34 #3404FF

tetradic

#FF3404 #51FF04 #04CFFF #B104FF

square

#FF3404 #51FF04 #04CFFF #B104FF

split-complementary

#FF3404 #04FFB1 #0451FF

monochromatic

#891A00 #C62600 #FF3404 #FF6541 #FF977E

Accessibility & contrast

On white

3.66

#FF3404 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.75

#FF3404 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #FF3404

5.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##FF3404	#FFFFFF	#000000	##000000
##FF3404	1.00	3.66	5.75	5.75
#FFFFFF	3.66	1.00	21.00	21.00
#000000	5.75	21.00	1.00	1.00
##000000	5.75	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#786900

Deuteranopia (green-blind)

#A99600

Tritanopia (blue-blind)

#FF002F

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #ff3404;
/* rgb */ color: rgb(255, 52, 4);
/* oklch */ color: oklch(64.7% 0.240 32.5);

Tailwind

colors: {
  custom: {
    50: '#ff7e56',
    500: '#ff3404',
    950: '#000000',
  },
}

SCSS

$custom: #ff3404;
$custom-light: #ff7e56;
$custom-dark: #000000;

JSON

{
  "hex": "#ff3404",
  "rgb": {
    "r": 255,
    "g": 52,
    "b": 4
  },
  "hsl": {
    "h": 11.474,
    "s": 100,
    "l": 50.784
  },
  "oklch": {
    "l": 0.64708,
    "c": 0.24015,
    "h": 32.5
  },
  "luminance": 0.23725
}

Semantic roles & 50–950 ramp

primary

#FF3404

secondary

#78D2E7

accent

#D6FF29

background

#FFF8F5

surface

#FFEFE9

border

#D7CAC5

text

#1C0B03

muted

#887C78

Preview Lab

Preview with #FF3404

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

Preview Lab → · Contrast checker → · Palette generator →