#1B2F52#1B2F52

#1B2F52 is a dark, moderate blue. Relative luminance 0.029; OKLCH L 30.8% C 0.068 H 260.9°. Best body text is #FFFFFF at 13.33:1 contrast (WCAG AA passes).

Color values

HEX	#1B2F52
RGB	rgb(27, 47, 82)
HSL	hsl(218, 50%, 21%)
HSV	hsv(218, 67%, 32%)
CMYK	cmyk(67.1%, 42.7%, 0%, 67.8%)
CIE-LAB	lab(19.54, 4.68, -23.80)
CIE-LCH	lch(19.54, 24.25, 281.13°)
OKLab	oklab(30.78% -0.0109 -0.0676)
OKLCH	oklch(30.78% 0.068 260.9)
XYZ	xyz(2.9910, 2.8750, 8.3783)
Luminance	0.0288 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2F52 #523E1B

analogous

#1B4B52 #1B2F52 #231B52

triadic

#1B2F52 #521B2F #2F521B

tetradic

#1B2F52 #521B4B #523E1B #1B5223

square

#1B2F52 #521B4B #523E1B #1B5223

split-complementary

#1B2F52 #52231B #4B521B

monochromatic

#080D17 #0C1524 #1B2F52 #2A4980 #3964AE

Accessibility & contrast

On white

13.33

#1B2F52 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.58

#1B2F52 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2F52

13.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2F52	#FFFFFF	#000000	##FFFFFF
##1B2F52	1.00	13.33	1.58	13.33
#FFFFFF	13.33	1.00	21.00	1.00
#000000	1.58	21.00	1.00	21.00
##FFFFFF	13.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#203253

Deuteranopia (green-blind)

#182D51

Tritanopia (blue-blind)

#00373C

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1b2f52;
/* rgb */ color: rgb(27, 47, 82);
/* oklch */ color: oklch(30.8% 0.068 260.9);

Tailwind

colors: {
  custom: {
    50: '#5d6783',
    500: '#1b2f52',
    950: '#000000',
  },
}

SCSS

$custom: #1b2f52;
$custom-light: #5d6783;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2f52",
  "rgb": {
    "r": 27,
    "g": 47,
    "b": 82
  },
  "hsl": {
    "h": 218.182,
    "s": 50.459,
    "l": 21.373
  },
  "oklch": {
    "l": 0.30777,
    "c": 0.06849,
    "h": 260.9
  },
  "luminance": 0.02875
}

Semantic roles & 50–950 ramp

primary

#1B2F52

secondary

#886E41

accent

#A74EDA

background

#F5F6F8

surface

#E9EBEF

border

#C5C6CA

text

#04060A

muted

#797A7C

Preview Lab

Preview with #1B2F52

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

Preview Lab → · Contrast checker → · Palette generator →