#10404B#10404B

#10404B is a dark, muted cyan. Relative luminance 0.043; OKLCH L 34.5% C 0.053 H 216.4°. Best body text is #FFFFFF at 11.31:1 contrast (WCAG AA passes).

Color values

HEX	#10404B
RGB	rgb(16, 64, 75)
HSL	hsl(191, 65%, 18%)
HSV	hsv(191, 79%, 29%)
CMYK	cmyk(78.7%, 14.7%, 0%, 70.6%)
CIE-LAB	lab(24.59, -11.57, -11.29)
CIE-LCH	lch(24.59, 16.17, 224.30°)
OKLab	oklab(34.53% -0.0428 -0.0315)
OKLCH	oklch(34.53% 0.053 216.4)
XYZ	xyz(3.3165, 4.2846, 7.3075)
Luminance	0.0428 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10404B #4B1B10

analogous

#104B38 #10404B #10234B

triadic

#10404B #4B1040 #404B10

tetradic

#10404B #38104B #4B1B10 #234B10

square

#10404B #38104B #4B1B10 #234B10

split-complementary

#10404B #4B1023 #4B3810

monochromatic

#051619 #051619 #10404B #1B6B7D #2696B0

Accessibility & contrast

On white

11.31

#10404B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#10404B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10404B

11.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10404B	#FFFFFF	#000000	##FFFFFF
##10404B	1.00	11.31	1.86	11.31
#FFFFFF	11.31	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#393E4C

Deuteranopia (green-blind)

#30384B

Tritanopia (blue-blind)

#004443

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #10404b;
/* rgb */ color: rgb(16, 64, 75);
/* oklch */ color: oklch(34.5% 0.053 216.4);

Tailwind

colors: {
  custom: {
    50: '#58757d',
    500: '#10404b',
    950: '#000000',
  },
}

SCSS

$custom: #10404b;
$custom-light: #58757d;
$custom-dark: #000000;

JSON

{
  "hex": "#10404b",
  "rgb": {
    "r": 16,
    "g": 64,
    "b": 75
  },
  "hsl": {
    "h": 191.186,
    "s": 64.835,
    "l": 17.843
  },
  "oklch": {
    "l": 0.34531,
    "c": 0.0531,
    "h": 216.4
  },
  "luminance": 0.04285
}

Semantic roles & 50–950 ramp

primary

#10404B

secondary

#854132

accent

#5F40E8

background

#F5F7F7

surface

#E9EDEE

border

#C5C8C9

text

#040809

muted

#797B7B

Preview Lab

Preview with #10404B

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

Preview Lab → · Contrast checker → · Palette generator →