#1B2F4E#1B2F4E

#1B2F4E is a dark, moderate blue. Relative luminance 0.028; OKLCH L 30.5% C 0.062 H 258.9°. Best body text is #FFFFFF at 13.43:1 contrast (WCAG AA passes).

Color values

HEX	#1B2F4E
RGB	rgb(27, 47, 78)
HSL	hsl(216, 49%, 21%)
HSV	hsv(216, 65%, 31%)
CMYK	cmyk(65.4%, 39.7%, 0%, 69.4%)
CIE-LAB	lab(19.29, 3.10, -21.50)
CIE-LCH	lch(19.29, 21.72, 278.19°)
OKLab	oklab(30.51% -0.012 -0.0609)
OKLCH	oklch(30.51% 0.062 258.9)
XYZ	xyz(2.8432, 2.8159, 7.5999)
Luminance	0.0282 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2F4E #4E3A1B

analogous

#1B484E #1B2F4E #211B4E

triadic

#1B2F4E #4E1B2F #2F4E1B

tetradic

#1B2F4E #4E1B48 #4E3A1B #1B4E21

square

#1B2F4E #4E1B48 #4E3A1B #1B4E21

split-complementary

#1B2F4E #4E211B #484E1B

monochromatic

#080E17 #0B1421 #1B2F4E #2B4A7B #3A66A9

Accessibility & contrast

On white

13.43

#1B2F4E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.56

#1B2F4E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2F4E

13.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2F4E	#FFFFFF	#000000	##FFFFFF
##1B2F4E	1.00	13.43	1.56	13.43
#FFFFFF	13.43	1.00	21.00	1.00
#000000	1.56	21.00	1.00	21.00
##FFFFFF	13.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#22314F

Deuteranopia (green-blind)

#1B2D4D

Tritanopia (blue-blind)

#00363A

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1b2f4e;
/* rgb */ color: rgb(27, 47, 78);
/* oklch */ color: oklch(30.5% 0.062 258.9);

Tailwind

colors: {
  custom: {
    50: '#5d6780',
    500: '#1b2f4e',
    950: '#000000',
  },
}

SCSS

$custom: #1b2f4e;
$custom-light: #5d6780;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2f4e",
  "rgb": {
    "r": 27,
    "g": 47,
    "b": 78
  },
  "hsl": {
    "h": 216.471,
    "s": 48.571,
    "l": 20.588
  },
  "oklch": {
    "l": 0.30507,
    "c": 0.06207,
    "h": 258.9
  },
  "luminance": 0.02816
}

Semantic roles & 50–950 ramp

primary

#1B2F4E

secondary

#846A41

accent

#A350D8

background

#F5F6F7

surface

#E9EBEE

border

#C5C6C9

text

#04060A

muted

#797A7C

Preview Lab

Preview with #1B2F4E

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

Preview Lab → · Contrast checker → · Palette generator →