#0A3F40#0A3F40

#0A3F40 is a dark, muted teal. Relative luminance 0.040; OKLCH L 33.6% C 0.052 H 196.9°. Best body text is #FFFFFF at 11.68:1 contrast (WCAG AA passes).

Color values

HEX	#0A3F40
RGB	rgb(10, 63, 64)
HSL	hsl(181, 73%, 15%)
HSV	hsv(181, 84%, 25%)
CMYK	cmyk(84.4%, 1.6%, 0%, 74.9%)
CIE-LAB	lab(23.64, -15.92, -5.46)
CIE-LCH	lch(23.64, 16.83, 198.94°)
OKLab	oklab(33.57% -0.05 -0.0152)
OKLCH	oklch(33.57% 0.052 196.9)
XYZ	xyz(2.8277, 3.9894, 5.4705)
Luminance	0.0399 (WCAG relative)
Temperature	cool
Family	teal

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0A3F40 #400B0A

analogous

#0A4026 #0A3F40 #0A2440

triadic

#0A3F40 #400A3F #3F400A

tetradic

#0A3F40 #260A40 #400B0A #24400A

square

#0A3F40 #260A40 #400B0A #24400A

split-complementary

#0A3F40 #400A24 #40260A

monochromatic

#041A1A #041A1A #0A3F40 #127375 #1BA7AA

Accessibility & contrast

On white

11.68

#0A3F40 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#0A3F40 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0A3F40

11.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0A3F40	#FFFFFF	#000000	##FFFFFF
##0A3F40	1.00	11.68	1.80	11.68
#FFFFFF	11.68	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3A3C40

Deuteranopia (green-blind)

#323640

Tritanopia (blue-blind)

#00413F

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #0a3f40;
/* rgb */ color: rgb(10, 63, 64);
/* oklch */ color: oklch(33.6% 0.052 196.9);

Tailwind

colors: {
  custom: {
    50: '#557474',
    500: '#0a3f40',
    950: '#000000',
  },
}

SCSS

$custom: #0a3f40;
$custom-light: #557474;
$custom-dark: #000000;

JSON

{
  "hex": "#0a3f40",
  "rgb": {
    "r": 10,
    "g": 63,
    "b": 64
  },
  "hsl": {
    "h": 181.111,
    "s": 72.973,
    "l": 14.51
  },
  "oklch": {
    "l": 0.3357,
    "c": 0.05227,
    "h": 196.9
  },
  "luminance": 0.0399
}

Semantic roles & 50–950 ramp

primary

#0A3F40

secondary

#7D2A29

accent

#3C38F0

background

#F5F7F7

surface

#E9EDED

border

#C5C8C8

text

#030808

muted

#787B7B

Preview Lab

Preview with #0A3F40

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

Preview Lab → · Contrast checker → · Palette generator →