#1B2F4F#1B2F4F

#1B2F4F is a dark, moderate blue. Relative luminance 0.028; OKLCH L 30.6% C 0.064 H 259.4°. Best body text is #FFFFFF at 13.41:1 contrast (WCAG AA passes).

Color values

HEX	#1B2F4F
RGB	rgb(27, 47, 79)
HSL	hsl(217, 49%, 21%)
HSV	hsv(217, 66%, 31%)
CMYK	cmyk(65.8%, 40.5%, 0%, 69%)
CIE-LAB	lab(19.35, 3.49, -22.08)
CIE-LCH	lch(19.35, 22.35, 278.99°)
OKLab	oklab(30.57% -0.0117 -0.0626)
OKLCH	oklch(30.57% 0.064 259.4)
XYZ	xyz(2.8793, 2.8303, 7.7902)
Luminance	0.0283 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2F4F #4F3B1B

analogous

#1B494F #1B2F4F #211B4F

triadic

#1B2F4F #4F1B2F #2F4F1B

tetradic

#1B2F4F #4F1B49 #4F3B1B #1B4F21

square

#1B2F4F #4F1B49 #4F3B1B #1B4F21

split-complementary

#1B2F4F #4F211B #494F1B

monochromatic

#080E17 #0B1421 #1B2F4F #2B4A7D #3A65AA

Accessibility & contrast

On white

13.41

#1B2F4F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#1B2F4F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2F4F

13.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2F4F	#FFFFFF	#000000	##FFFFFF
##1B2F4F	1.00	13.41	1.57	13.41
#FFFFFF	13.41	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#213250

Deuteranopia (green-blind)

#1B2D4E

Tritanopia (blue-blind)

#00363B

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1b2f4f;
/* rgb */ color: rgb(27, 47, 79);
/* oklch */ color: oklch(30.6% 0.064 259.4);

Tailwind

colors: {
  custom: {
    50: '#5d6780',
    500: '#1b2f4f',
    950: '#000000',
  },
}

SCSS

$custom: #1b2f4f;
$custom-light: #5d6780;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2f4f",
  "rgb": {
    "r": 27,
    "g": 47,
    "b": 79
  },
  "hsl": {
    "h": 216.923,
    "s": 49.057,
    "l": 20.784
  },
  "oklch": {
    "l": 0.30573,
    "c": 0.06366,
    "h": 259.4
  },
  "luminance": 0.02831
}

Semantic roles & 50–950 ramp

primary

#1B2F4F

secondary

#856B41

accent

#A44FD9

background

#F5F6F7

surface

#E9EBEE

border

#C5C6C9

text

#04060A

muted

#797A7C

Preview Lab

Preview with #1B2F4F

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

Preview Lab → · Contrast checker → · Palette generator →