#1B404B#1B404B

#1B404B is a dark, muted cyan. Relative luminance 0.044; OKLCH L 34.9% C 0.046 H 220.0°. Best body text is #FFFFFF at 11.16:1 contrast (WCAG AA passes).

Color values

HEX	#1B404B
RGB	rgb(27, 64, 75)
HSL	hsl(194, 47%, 20%)
HSV	hsv(194, 64%, 29%)
CMYK	cmyk(64%, 14.7%, 0%, 70.6%)
CIE-LAB	lab(24.98, -9.41, -10.67)
CIE-LCH	lch(24.98, 14.22, 228.60°)
OKLab	oklab(34.95% -0.0353 -0.0296)
OKLCH	oklch(34.95% 0.046 220)
XYZ	xyz(3.5549, 4.4075, 7.3186)
Luminance	0.0441 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B404B #4B261B

analogous

#1B4B3E #1B404B #1B284B

triadic

#1B404B #4B1B40 #404B1B

tetradic

#1B404B #3E1B4B #4B261B #284B1B

square

#1B404B #3E1B4B #4B261B #284B1B

split-complementary

#1B404B #4B1B28 #4B3E1B

monochromatic

#081317 #0B1A1E #1B404B #2B6678 #3B8DA5

Accessibility & contrast

On white

11.16

#1B404B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#1B404B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B404B

11.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B404B	#FFFFFF	#000000	##FFFFFF
##1B404B	1.00	11.16	1.88	11.16
#FFFFFF	11.16	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#393E4C

Deuteranopia (green-blind)

#32394B

Tritanopia (blue-blind)

#004443

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1b404b;
/* rgb */ color: rgb(27, 64, 75);
/* oklch */ color: oklch(34.9% 0.046 220.0);

Tailwind

colors: {
  custom: {
    50: '#5d747d',
    500: '#1b404b',
    950: '#000000',
  },
}

SCSS

$custom: #1b404b;
$custom-light: #5d747d;
$custom-dark: #000000;

JSON

{
  "hex": "#1b404b",
  "rgb": {
    "r": 27,
    "g": 64,
    "b": 75
  },
  "hsl": {
    "h": 193.75,
    "s": 47.059,
    "l": 20
  },
  "oklch": {
    "l": 0.34948,
    "c": 0.04613,
    "h": 220
  },
  "luminance": 0.04408
}

Semantic roles & 50–950 ramp

primary

#1B404B

secondary

#815041

accent

#7051D7

background

#F5F7F7

surface

#E9EDEE

border

#C5C8C9

text

#040809

muted

#797B7B

Preview Lab

Preview with #1B404B

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

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