#1B2F71#1B2F71

#1B2F71 is a dark, moderate blue. Relative luminance 0.035; OKLCH L 33.2% C 0.117 H 267.0°. Best body text is #FFFFFF at 12.41:1 contrast (WCAG AA passes).

Color values

HEX	#1B2F71
RGB	rgb(27, 47, 113)
HSL	hsl(226, 61%, 27%)
HSV	hsv(226, 76%, 44%)
CMYK	cmyk(76.1%, 58.4%, 0%, 55.7%)
CIE-LAB	lab(21.79, 17.29, -40.50)
CIE-LCH	lch(21.79, 44.03, 293.12°)
OKLab	oklab(33.22% -0.0061 -0.1167)
OKLCH	oklch(33.22% 0.117 267)
XYZ	xyz(4.4481, 3.4578, 16.0526)
Luminance	0.0346 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2F71 #715D1B

analogous

#1B5A71 #1B2F71 #321B71

triadic

#1B2F71 #711B2F #2F711B

tetradic

#1B2F71 #711B5A #715D1B #1B7132

square

#1B2F71 #711B5A #715D1B #1B7132

split-complementary

#1B2F71 #71321B #5A711B

monochromatic

#060A19 #0F1A40 #1B2F71 #2744A2 #375BCF

Accessibility & contrast

On white

12.41

#1B2F71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.69

#1B2F71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2F71

12.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2F71	#FFFFFF	#000000	##FFFFFF
##1B2F71	1.00	12.41	1.69	12.41
#FFFFFF	12.41	1.00	21.00	1.00
#000000	1.69	21.00	1.00	21.00
##FFFFFF	12.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003873

Deuteranopia (green-blind)

#003070

Tritanopia (blue-blind)

#003F4B

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #1b2f71;
/* rgb */ color: rgb(27, 47, 113);
/* oklch */ color: oklch(33.2% 0.117 267.0);

Tailwind

colors: {
  custom: {
    50: '#65679a',
    500: '#1b2f71',
    950: '#000000',
  },
}

SCSS

$custom: #1b2f71;
$custom-light: #65679a;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2f71",
  "rgb": {
    "r": 27,
    "g": 47,
    "b": 113
  },
  "hsl": {
    "h": 226.047,
    "s": 61.429,
    "l": 27.451
  },
  "oklch": {
    "l": 0.3322,
    "c": 0.11686,
    "h": 267
  },
  "luminance": 0.03458
}

Semantic roles & 50–950 ramp

primary

#1B2F71

secondary

#A68F42

accent

#BF43E5

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060E

muted

#7A7A7E

Preview Lab

Preview with #1B2F71

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

Preview Lab → · Contrast checker → · Palette generator →