#AA3739#AA3739

#AA3739 is a mid, vivid red. Relative luminance 0.116; OKLCH L 50.6% C 0.151 H 23.4°. Best body text is #FFFFFF at 6.34:1 contrast (WCAG AA passes).

Color values

HEX	#AA3739
RGB	rgb(170, 55, 57)
HSL	hsl(359, 51%, 44%)
HSV	hsv(359, 68%, 67%)
CMYK	cmyk(0%, 67.6%, 66.5%, 33.3%)
CIE-LAB	lab(40.53, 47.04, 25.28)
CIE-LCH	lch(40.53, 53.40, 28.26°)
OKLab	oklab(50.55% 0.1382 0.0597)
OKLCH	oklch(50.55% 0.151 23.4)
XYZ	xyz(18.6842, 11.5765, 5.1207)
Luminance	0.1157 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#AA3739 #37AAA8

analogous

#AA3772 #AA3739 #AA6F37

triadic

#AA3739 #39AA37 #3739AA

tetradic

#AA3739 #72AA37 #37AAA8 #6F37AA

square

#AA3739 #72AA37 #37AAA8 #6F37AA

split-complementary

#AA3739 #37AA6F #3772AA

monochromatic

#4E191A #7C2829 #AA3739 #C85658 #D78486

Accessibility & contrast

On white

6.34

#AA3739 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.31

#AA3739 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #AA3739

6.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##AA3739	#FFFFFF	#000000	##FFFFFF
##AA3739	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)

#565038

Deuteranopia (green-blind)

#736936

Tritanopia (blue-blind)

#BB1A39

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #aa3739;
/* rgb */ color: rgb(170, 55, 57);
/* oklch */ color: oklch(50.6% 0.151 23.4);

Tailwind

colors: {
  custom: {
    50: '#ca756f',
    500: '#aa3739',
    950: '#000000',
  },
}

SCSS

$custom: #aa3739;
$custom-light: #ca756f;
$custom-dark: #000000;

JSON

{
  "hex": "#aa3739",
  "rgb": {
    "r": 170,
    "g": 55,
    "b": 57
  },
  "hsl": {
    "h": 358.957,
    "s": 51.111,
    "l": 44.118
  },
  "oklch": {
    "l": 0.50551,
    "c": 0.15055,
    "h": 23.4
  },
  "luminance": 0.11574
}

Semantic roles & 50–950 ramp

primary

#AA3739

secondary

#7CC1C0

accent

#DBD84D

background

#FDF7F6

surface

#FAEDEC

border

#D3C8C7

text

#150907

muted

#837B7A

Preview Lab

Preview with #AA3739

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

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