#1B4152#1B4152

#1B4152 is a dark, muted cyan. Relative luminance 0.046; OKLCH L 35.6% C 0.052 H 229.9°. Best body text is #FFFFFF at 10.91:1 contrast (WCAG AA passes).

Color values

HEX	#1B4152
RGB	rgb(27, 65, 82)
HSL	hsl(199, 50%, 21%)
HSV	hsv(199, 67%, 32%)
CMYK	cmyk(67.1%, 20.7%, 0%, 67.8%)
CIE-LAB	lab(25.63, -7.51, -14.26)
CIE-LCH	lch(25.63, 16.12, 242.24°)
OKLab	oklab(35.57% -0.0335 -0.0398)
OKLCH	oklch(35.57% 0.052 229.9)
XYZ	xyz(3.8647, 4.6224, 8.6696)
Luminance	0.0462 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4152 #522C1B

analogous

#1B5248 #1B4152 #1B2652

triadic

#1B4152 #521B41 #41521B

tetradic

#1B4152 #481B52 #522C1B #26521B

square

#1B4152 #481B52 #522C1B #26521B

split-complementary

#1B4152 #521B26 #52481B

monochromatic

#081217 #0C1D24 #1B4152 #2A6580 #398AAE

Accessibility & contrast

On white

10.91

#1B4152 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.92

#1B4152 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4152

10.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4152	#FFFFFF	#000000	##FFFFFF
##1B4152	1.00	10.91	1.92	10.91
#FFFFFF	10.91	1.00	21.00	1.00
#000000	1.92	21.00	1.00	21.00
##FFFFFF	10.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#384053

Deuteranopia (green-blind)

#313A52

Tritanopia (blue-blind)

#004647

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1b4152;
/* rgb */ color: rgb(27, 65, 82);
/* oklch */ color: oklch(35.6% 0.052 229.9);

Tailwind

colors: {
  custom: {
    50: '#5e7582',
    500: '#1b4152',
    950: '#000000',
  },
}

SCSS

$custom: #1b4152;
$custom-light: #5e7582;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4152",
  "rgb": {
    "r": 27,
    "g": 65,
    "b": 82
  },
  "hsl": {
    "h": 198.545,
    "s": 50.459,
    "l": 21.373
  },
  "oklch": {
    "l": 0.35574,
    "c": 0.05207,
    "h": 229.9
  },
  "luminance": 0.04623
}

Semantic roles & 50–950 ramp

primary

#1B4152

secondary

#885741

accent

#794EDA

background

#F5F7F7

surface

#E9EDEE

border

#C5C8C9

text

#05080A

muted

#797B7C

Preview Lab

Preview with #1B4152

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

Preview Lab → · Contrast checker → · Palette generator →