#1B2B4B#1B2B4B

#1B2B4B is a dark, moderate blue. Relative luminance 0.025; OKLCH L 29.3% C 0.062 H 263.0°. Best body text is #FFFFFF at 14.06:1 contrast (WCAG AA passes).

Color values

HEX	#1B2B4B
RGB	rgb(27, 43, 75)
HSL	hsl(220, 47%, 20%)
HSV	hsv(220, 64%, 29%)
CMYK	cmyk(64%, 42.7%, 0%, 70.6%)
CIE-LAB	lab(17.78, 4.79, -21.87)
CIE-LCH	lch(17.78, 22.39, 282.34°)
OKLab	oklab(29.27% -0.0076 -0.062)
OKLCH	oklch(29.27% 0.062 263)
XYZ	xyz(2.5854, 2.4686, 6.9955)
Luminance	0.0247 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2B4B #4B3B1B

analogous

#1B434B #1B2B4B #231B4B

triadic

#1B2B4B #4B1B2B #2B4B1B

tetradic

#1B2B4B #4B1B43 #4B3B1B #1B4B23

square

#1B2B4B #4B1B43 #4B3B1B #1B4B23

split-complementary

#1B2B4B #4B231B #434B1B

monochromatic

#080D17 #0B111E #1B2B4B #2B4578 #3B5FA5

Accessibility & contrast

On white

14.06

#1B2B4B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.49

#1B2B4B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2B4B

14.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2B4B	#FFFFFF	#000000	##FFFFFF
##1B2B4B	1.00	14.06	1.49	14.06
#FFFFFF	14.06	1.00	21.00	1.00
#000000	1.49	21.00	1.00	21.00
##FFFFFF	14.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E2E4C

Deuteranopia (green-blind)

#17294A

Tritanopia (blue-blind)

#003237

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #1b2b4b;
/* rgb */ color: rgb(27, 43, 75);
/* oklch */ color: oklch(29.3% 0.062 263.0);

Tailwind

colors: {
  custom: {
    50: '#5c647d',
    500: '#1b2b4b',
    950: '#000000',
  },
}

SCSS

$custom: #1b2b4b;
$custom-light: #5c647d;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2b4b",
  "rgb": {
    "r": 27,
    "g": 43,
    "b": 75
  },
  "hsl": {
    "h": 220,
    "s": 47.059,
    "l": 20
  },
  "oklch": {
    "l": 0.29271,
    "c": 0.06249,
    "h": 263
  },
  "luminance": 0.02469
}

Semantic roles & 50–950 ramp

primary

#1B2B4B

secondary

#816C41

accent

#AA51D7

background

#F5F5F7

surface

#E9EAEE

border

#C5C6C9

text

#040509

muted

#79797B

Preview Lab

Preview with #1B2B4B

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

Preview Lab → · Contrast checker → · Palette generator →