#1B3152#1B3152

#1B3152 is a dark, moderate blue. Relative luminance 0.030; OKLCH L 31.3% C 0.066 H 258.3°. Best body text is #FFFFFF at 13.06:1 contrast (WCAG AA passes).

Color values

HEX	#1B3152
RGB	rgb(27, 49, 82)
HSL	hsl(216, 50%, 21%)
HSV	hsv(216, 67%, 32%)
CMYK	cmyk(67.1%, 40.2%, 0%, 67.8%)
CIE-LAB	lab(20.20, 3.26, -22.75)
CIE-LCH	lch(20.20, 22.98, 278.15°)
OKLab	oklab(31.29% -0.0134 -0.0645)
OKLCH	oklch(31.29% 0.066 258.3)
XYZ	xyz(3.0728, 3.0386, 8.4056)
Luminance	0.0304 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3152 #523C1B

analogous

#1B4D52 #1B3152 #211B52

triadic

#1B3152 #521B31 #31521B

tetradic

#1B3152 #521B4D #523C1B #1B5221

square

#1B3152 #521B4D #523C1B #1B5221

split-complementary

#1B3152 #52211B #4D521B

monochromatic

#080E17 #0C1524 #1B3152 #2A4D80 #3968AE

Accessibility & contrast

On white

13.06

#1B3152 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.61

#1B3152 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3152

13.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3152	#FFFFFF	#000000	##FFFFFF
##1B3152	1.00	13.06	1.61	13.06
#FFFFFF	13.06	1.00	21.00	1.00
#000000	1.61	21.00	1.00	21.00
##FFFFFF	13.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#233453

Deuteranopia (green-blind)

#1B2E51

Tritanopia (blue-blind)

#00383D

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #1b3152;
/* rgb */ color: rgb(27, 49, 82);
/* oklch */ color: oklch(31.3% 0.066 258.3);

Tailwind

colors: {
  custom: {
    50: '#5d6883',
    500: '#1b3152',
    950: '#000000',
  },
}

SCSS

$custom: #1b3152;
$custom-light: #5d6883;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3152",
  "rgb": {
    "r": 27,
    "g": 49,
    "b": 82
  },
  "hsl": {
    "h": 216,
    "s": 50.459,
    "l": 21.373
  },
  "oklch": {
    "l": 0.31291,
    "c": 0.06589,
    "h": 258.3
  },
  "luminance": 0.03039
}

Semantic roles & 50–950 ramp

primary

#1B3152

secondary

#886B41

accent

#A24EDA

background

#F5F6F8

surface

#E9EBEF

border

#C5C6CA

text

#04060A

muted

#797A7C

Preview Lab

Preview with #1B3152

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

Preview Lab → · Contrast checker → · Palette generator →