#1B2F77#1B2F77

#1B2F77 is a dark, vivid blue. Relative luminance 0.036; OKLCH L 33.8% C 0.126 H 267.3°. Best body text is #FFFFFF at 12.21:1 contrast (WCAG AA passes).

Color values

HEX	#1B2F77
RGB	rgb(27, 47, 119)
HSL	hsl(227, 63%, 29%)
HSV	hsv(227, 77%, 47%)
CMYK	cmyk(77.3%, 60.5%, 0%, 53.3%)
CIE-LAB	lab(22.29, 19.72, -43.52)
CIE-LCH	lch(22.29, 47.78, 294.38°)
OKLab	oklab(33.75% -0.0058 -0.1256)
OKLCH	oklch(33.75% 0.126 267.3)
XYZ	xyz(4.7971, 3.5974, 17.8907)
Luminance	0.0360 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2F77 #77631B

analogous

#1B5D77 #1B2F77 #351B77

triadic

#1B2F77 #771B2F #2F771B

tetradic

#1B2F77 #771B5D #77631B #1B7735

square

#1B2F77 #771B5D #77631B #1B7735

split-complementary

#1B2F77 #77351B #5D771B

monochromatic

#060A19 #101B45 #1B2F77 #2643A9 #3A5BD2

Accessibility & contrast

On white

12.21

#1B2F77 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.72

#1B2F77 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2F77

12.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2F77	#FFFFFF	#000000	##FFFFFF
##1B2F77	1.00	12.21	1.72	12.21
#FFFFFF	12.21	1.00	21.00	1.00
#000000	1.72	21.00	1.00	21.00
##FFFFFF	12.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003A79

Deuteranopia (green-blind)

#003176

Tritanopia (blue-blind)

#00414E

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #1b2f77;
/* rgb */ color: rgb(27, 47, 119);
/* oklch */ color: oklch(33.8% 0.126 267.3);

Tailwind

colors: {
  custom: {
    50: '#66679f',
    500: '#1b2f77',
    950: '#000000',
  },
}

SCSS

$custom: #1b2f77;
$custom-light: #66679f;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2f77",
  "rgb": {
    "r": 27,
    "g": 47,
    "b": 119
  },
  "hsl": {
    "h": 226.957,
    "s": 63.014,
    "l": 28.627
  },
  "oklch": {
    "l": 0.33754,
    "c": 0.12573,
    "h": 267.3
  },
  "luminance": 0.03598
}

Semantic roles & 50–950 ramp

primary

#1B2F77

secondary

#AB9542

accent

#C242E6

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#07060E

muted

#7A7A7E

Preview Lab

Preview with #1B2F77

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

Preview Lab → · Contrast checker → · Palette generator →