#AA3737#AA3737

#AA3737 is a mid, vivid red. Relative luminance 0.116; OKLCH L 50.5% C 0.151 H 24.3°. Best body text is #FFFFFF at 6.34:1 contrast (WCAG AA passes).

Color values

HEX	#AA3737
RGB	rgb(170, 55, 55)
HSL	hsl(0, 51%, 44%)
HSV	hsv(0, 68%, 67%)
CMYK	cmyk(0%, 67.6%, 67.6%, 33.3%)
CIE-LAB	lab(40.50, 46.92, 26.46)
CIE-LCH	lch(40.50, 53.87, 29.42°)
OKLab	oklab(50.52% 0.1374 0.062)
OKLCH	oklch(50.52% 0.151 24.3)
XYZ	xyz(18.6353, 11.5569, 4.8631)
Luminance	0.1155 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#AA3737 #37AAAA

analogous

#AA3771 #AA3737 #AA7137

triadic

#AA3737 #37AA37 #3737AA

tetradic

#AA3737 #71AA37 #37AAAA #7137AA

square

#AA3737 #71AA37 #37AAAA #7137AA

split-complementary

#AA3737 #37AA71 #3771AA

monochromatic

#4E1919 #7C2828 #AA3737 #C85656 #D78484

Accessibility & contrast

On white

6.34

#AA3737 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.31

#AA3737 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #AA3737

6.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##AA3737	#FFFFFF	#000000	##FFFFFF
##AA3737	1.00	6.34	3.31	6.34
#FFFFFF	6.34	1.00	21.00	1.00
#000000	3.31	21.00	1.00	21.00
##FFFFFF	6.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#565036

Deuteranopia (green-blind)

#736934

Tritanopia (blue-blind)

#BB1938

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #aa3737;
/* rgb */ color: rgb(170, 55, 55);
/* oklch */ color: oklch(50.5% 0.151 24.3);

Tailwind

colors: {
  custom: {
    50: '#ca756e',
    500: '#aa3737',
    950: '#000000',
  },
}

SCSS

$custom: #aa3737;
$custom-light: #ca756e;
$custom-dark: #000000;

JSON

{
  "hex": "#aa3737",
  "rgb": {
    "r": 170,
    "g": 55,
    "b": 55
  },
  "hsl": {
    "h": 0,
    "s": 51.111,
    "l": 44.118
  },
  "oklch": {
    "l": 0.50517,
    "c": 0.15079,
    "h": 24.3
  },
  "luminance": 0.11554
}

Semantic roles & 50–950 ramp

primary

#AA3737

secondary

#7CC1C1

accent

#DBDB4D

background

#FDF7F6

surface

#FAEDEB

border

#D3C8C6

text

#150907

muted

#837B7A

Preview Lab

Preview with #AA3737

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

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