#1B277A#1B277A

#1B277A is a dark, vivid blue. Relative luminance 0.031; OKLCH L 32.4% C 0.140 H 269.9°. Best body text is #FFFFFF at 12.98:1 contrast (WCAG AA passes).

Color values

HEX	#1B277A
RGB	rgb(27, 39, 122)
HSL	hsl(232, 64%, 29%)
HSV	hsv(232, 78%, 48%)
CMYK	cmyk(77.9%, 68%, 0%, 52.2%)
CIE-LAB	lab(20.40, 26.50, -48.53)
CIE-LCH	lch(20.40, 55.30, 298.64°)
OKLab	oklab(32.44% -0.0001 -0.1404)
OKLCH	oklch(32.44% 0.14 269.9)
XYZ	xyz(4.6892, 3.0887, 18.7576)
Luminance	0.0309 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B277A #7A6E1B

analogous

#1B577A #1B277A #3F1B7A

triadic

#1B277A #7A1B27 #277A1B

tetradic

#1B277A #7A1B57 #7A6E1B #1B7A3F

square

#1B277A #7A1B57 #7A6E1B #1B7A3F

split-complementary

#1B277A #7A3F1B #577A1B

monochromatic

#060819 #101748 #1B277A #2637AC #3C4FD4

Accessibility & contrast

On white

12.98

#1B277A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.62

#1B277A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B277A

12.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B277A	#FFFFFF	#000000	##FFFFFF
##1B277A	1.00	12.98	1.62	12.98
#FFFFFF	12.98	1.00	21.00	1.00
#000000	1.62	21.00	1.00	21.00
##FFFFFF	12.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00367D

Deuteranopia (green-blind)

#002D78

Tritanopia (blue-blind)

#003D4C

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #1b277a;
/* rgb */ color: rgb(27, 39, 122);
/* oklch */ color: oklch(32.4% 0.140 269.9);

Tailwind

colors: {
  custom: {
    50: '#6861a1',
    500: '#1b277a',
    950: '#000000',
  },
}

SCSS

$custom: #1b277a;
$custom-light: #6861a1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b277a",
  "rgb": {
    "r": 27,
    "g": 39,
    "b": 122
  },
  "hsl": {
    "h": 232.421,
    "s": 63.758,
    "l": 29.216
  },
  "oklch": {
    "l": 0.32435,
    "c": 0.14038,
    "h": 269.9
  },
  "luminance": 0.03089
}

Semantic roles & 50–950 ramp

primary

#1B277A

secondary

#AEA143

accent

#D241E7

background

#F6F5FA

surface

#EBE9F3

border

#C6C5CD

text

#07050F

muted

#7A797F

Preview Lab

Preview with #1B277A

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

Preview Lab → · Contrast checker → · Palette generator →