#1B3D4E#1B3D4E

#1B3D4E is a dark, muted cyan. Relative luminance 0.041; OKLCH L 34.3% C 0.049 H 232.5°. Best body text is #FFFFFF at 11.51:1 contrast (WCAG AA passes).

Color values

HEX	#1B3D4E
RGB	rgb(27, 61, 78)
HSL	hsl(200, 49%, 21%)
HSV	hsv(200, 65%, 31%)
CMYK	cmyk(65.4%, 21.8%, 0%, 69.4%)
CIE-LAB	lab(24.06, -6.42, -14.05)
CIE-LCH	lch(24.06, 15.44, 245.44°)
OKLab	oklab(34.27% -0.0301 -0.0392)
OKLCH	oklch(34.27% 0.049 232.5)
XYZ	xyz(3.4954, 4.1202, 7.8173)
Luminance	0.0412 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3D4E #4E2C1B

analogous

#1B4E45 #1B3D4E #1B234E

triadic

#1B3D4E #4E1B3D #3D4E1B

tetradic

#1B3D4E #451B4E #4E2C1B #234E1B

square

#1B3D4E #451B4E #4E2C1B #234E1B

split-complementary

#1B3D4E #4E1B23 #4E451B

monochromatic

#081217 #0B1921 #1B3D4E #2B617B #3A84A9

Accessibility & contrast

On white

11.51

#1B3D4E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#1B3D4E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3D4E

11.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3D4E	#FFFFFF	#000000	##FFFFFF
##1B3D4E	1.00	11.51	1.82	11.51
#FFFFFF	11.51	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#353C4F

Deuteranopia (green-blind)

#2E374E

Tritanopia (blue-blind)

#004243

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #1b3d4e;
/* rgb */ color: rgb(27, 61, 78);
/* oklch */ color: oklch(34.3% 0.049 232.5);

Tailwind

colors: {
  custom: {
    50: '#5d727f',
    500: '#1b3d4e',
    950: '#000000',
  },
}

SCSS

$custom: #1b3d4e;
$custom-light: #5d727f;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3d4e",
  "rgb": {
    "r": 27,
    "g": 61,
    "b": 78
  },
  "hsl": {
    "h": 200,
    "s": 48.571,
    "l": 20.588
  },
  "oklch": {
    "l": 0.34266,
    "c": 0.04946,
    "h": 232.5
  },
  "luminance": 0.04121
}

Semantic roles & 50–950 ramp

primary

#1B3D4E

secondary

#845741

accent

#7D50D8

background

#F5F6F7

surface

#E9ECEE

border

#C5C7C9

text

#04080A

muted

#797B7C

Preview Lab

Preview with #1B3D4E

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

Preview Lab → · Contrast checker → · Palette generator →