#1B337A#1B337A

#1B337A is a dark, vivid blue. Relative luminance 0.040; OKLCH L 34.9% C 0.125 H 265.9°. Best body text is #FFFFFF at 11.66:1 contrast (WCAG AA passes).

Color values

HEX	#1B337A
RGB	rgb(27, 51, 122)
HSL	hsl(225, 64%, 29%)
HSV	hsv(225, 78%, 48%)
CMYK	cmyk(77.9%, 58.2%, 0%, 52.2%)
CIE-LAB	lab(23.69, 18.10, -43.16)
CIE-LCH	lch(23.69, 46.80, 292.75°)
OKLab	oklab(34.88% -0.0089 -0.1244)
OKLCH	oklch(34.88% 0.125 265.9)
XYZ	xyz(5.1474, 4.0052, 18.9104)
Luminance	0.0401 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B337A #7A621B

analogous

#1B637A #1B337A #331B7A

triadic

#1B337A #7A1B33 #337A1B

tetradic

#1B337A #7A1B63 #7A621B #1B7A33

square

#1B337A #7A1B63 #7A621B #1B7A33

split-complementary

#1B337A #7A331B #637A1B

monochromatic

#060A19 #101E48 #1B337A #2648AC #3C62D4

Accessibility & contrast

On white

11.66

#1B337A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#1B337A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B337A

11.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B337A	#FFFFFF	#000000	##FFFFFF
##1B337A	1.00	11.66	1.80	11.66
#FFFFFF	11.66	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003D7C

Deuteranopia (green-blind)

#003479

Tritanopia (blue-blind)

#004551

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1b337a;
/* rgb */ color: rgb(27, 51, 122);
/* oklch */ color: oklch(34.9% 0.125 265.9);

Tailwind

colors: {
  custom: {
    50: '#676aa1',
    500: '#1b337a',
    950: '#000000',
  },
}

SCSS

$custom: #1b337a;
$custom-light: #676aa1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b337a",
  "rgb": {
    "r": 27,
    "g": 51,
    "b": 122
  },
  "hsl": {
    "h": 224.842,
    "s": 63.758,
    "l": 29.216
  },
  "oklch": {
    "l": 0.34879,
    "c": 0.12477,
    "h": 265.9
  },
  "luminance": 0.04006
}

Semantic roles & 50–950 ramp

primary

#1B337A

secondary

#AE9343

accent

#BD41E7

background

#F6F6FA

surface

#EBEBF3

border

#C6C6CD

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #1B337A

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

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