#1B2F5F#1B2F5F

#1B2F5F is a dark, moderate blue. Relative luminance 0.031; OKLCH L 31.7% C 0.089 H 264.8°. Best body text is #FFFFFF at 12.98:1 contrast (WCAG AA passes).

Color values

HEX	#1B2F5F
RGB	rgb(27, 47, 95)
HSL	hsl(222, 56%, 24%)
HSV	hsv(222, 72%, 37%)
CMYK	cmyk(71.6%, 50.5%, 0%, 62.7%)
CIE-LAB	lab(20.41, 9.94, -31.03)
CIE-LCH	lch(20.41, 32.59, 287.76°)
OKLab	oklab(31.73% -0.0081 -0.0889)
OKLCH	oklch(31.73% 0.089 264.8)
XYZ	xyz(3.5333, 3.0919, 11.2348)
Luminance	0.0309 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2F5F #5F4B1B

analogous

#1B515F #1B2F5F #291B5F

triadic

#1B2F5F #5F1B2F #2F5F1B

tetradic

#1B2F5F #5F1B51 #5F4B1B #1B5F29

square

#1B2F5F #5F1B51 #5F4B1B #1B5F29

split-complementary

#1B2F5F #5F291B #515F1B

monochromatic

#070C18 #0D172F #1B2F5F #29478F #365EBE

Accessibility & contrast

On white

12.98

#1B2F5F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.62

#1B2F5F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2F5F

12.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2F5F	#FFFFFF	#000000	##FFFFFF
##1B2F5F	1.00	12.98	1.62	12.98
#FFFFFF	12.98	1.00	21.00	1.00
#000000	1.62	21.00	1.00	21.00
##FFFFFF	12.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#163461

Deuteranopia (green-blind)

#082E5E

Tritanopia (blue-blind)

#003A42

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #1b2f5f;
/* rgb */ color: rgb(27, 47, 95);
/* oklch */ color: oklch(31.7% 0.089 264.8);

Tailwind

colors: {
  custom: {
    50: '#60678d',
    500: '#1b2f5f',
    950: '#000000',
  },
}

SCSS

$custom: #1b2f5f;
$custom-light: #60678d;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2f5f",
  "rgb": {
    "r": 27,
    "g": 47,
    "b": 95
  },
  "hsl": {
    "h": 222.353,
    "s": 55.738,
    "l": 23.922
  },
  "oklch": {
    "l": 0.31731,
    "c": 0.08923,
    "h": 264.8
  },
  "luminance": 0.03092
}

Semantic roles & 50–950 ramp

primary

#1B2F5F

secondary

#957C41

accent

#B349DF

background

#F5F6F8

surface

#EAEBF0

border

#C6C6CB

text

#05060C

muted

#797A7D

Preview Lab

Preview with #1B2F5F

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

Preview Lab → · Contrast checker → · Palette generator →