#1B377A#1B377A

#1B377A is a dark, moderate blue. Relative luminance 0.044; OKLCH L 35.8% C 0.119 H 264.2°. Best body text is #FFFFFF at 11.20:1 contrast (WCAG AA passes).

Color values

HEX	#1B377A
RGB	rgb(27, 55, 122)
HSL	hsl(222, 64%, 29%)
HSV	hsv(222, 78%, 48%)
CMYK	cmyk(77.9%, 54.9%, 0%, 52.2%)
CIE-LAB	lab(24.86, 15.27, -41.26)
CIE-LCH	lch(24.86, 43.99, 290.30°)
OKLab	oklab(35.76% -0.0122 -0.1188)
OKLCH	oklch(35.76% 0.119 264.2)
XYZ	xyz(5.3298, 4.3699, 18.9712)
Luminance	0.0437 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B377A #7A5E1B

analogous

#1B677A #1B377A #2F1B7A

triadic

#1B377A #7A1B37 #377A1B

tetradic

#1B377A #7A1B67 #7A5E1B #1B7A2F

square

#1B377A #7A1B67 #7A5E1B #1B7A2F

split-complementary

#1B377A #7A2F1B #677A1B

monochromatic

#060B19 #102048 #1B377A #264EAC #3C68D4

Accessibility & contrast

On white

11.20

#1B377A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.87

#1B377A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B377A

11.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B377A	#FFFFFF	#000000	##FFFFFF
##1B377A	1.00	11.20	1.87	11.20
#FFFFFF	11.20	1.00	21.00	1.00
#000000	1.87	21.00	1.00	21.00
##FFFFFF	11.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#07407C

Deuteranopia (green-blind)

#003779

Tritanopia (blue-blind)

#004753

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1b377a;
/* rgb */ color: rgb(27, 55, 122);
/* oklch */ color: oklch(35.8% 0.119 264.2);

Tailwind

colors: {
  custom: {
    50: '#666da1',
    500: '#1b377a',
    950: '#000000',
  },
}

SCSS

$custom: #1b377a;
$custom-light: #666da1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b377a",
  "rgb": {
    "r": 27,
    "g": 55,
    "b": 122
  },
  "hsl": {
    "h": 222.316,
    "s": 63.758,
    "l": 29.216
  },
  "oklch": {
    "l": 0.35763,
    "c": 0.11942,
    "h": 264.2
  },
  "luminance": 0.04371
}

Semantic roles & 50–950 ramp

primary

#1B377A

secondary

#AE8E43

accent

#B641E7

background

#F6F6FA

surface

#EBEBF3

border

#C6C6CD

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1B377A

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

Preview Lab → · Contrast checker → · Palette generator →