#1B1F7D#1B1F7D

#1B1F7D is a dark, vivid blue. Relative luminance 0.027; OKLCH L 31.4% C 0.154 H 271.5°. Best body text is #FFFFFF at 13.65:1 contrast (WCAG AA passes).

Color values

HEX	#1B1F7D
RGB	rgb(27, 31, 125)
HSL	hsl(238, 64%, 30%)
HSV	hsv(238, 78%, 49%)
CMYK	cmyk(78.4%, 75.2%, 0%, 51%)
CIE-LAB	lab(18.77, 32.90, -53.12)
CIE-LCH	lch(18.77, 62.48, 301.77°)
OKLab	oklab(31.35% 0.0041 -0.1538)
OKLCH	oklch(31.35% 0.154 271.5)
XYZ	xyz(4.6424, 2.6932, 19.6732)
Luminance	0.0269 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1F7D #7D791B

analogous

#1B507D #1B1F7D #481B7D

triadic

#1B1F7D #7D1B1F #1F7D1B

tetradic

#1B1F7D #7D1B50 #7D791B #1B7D48

square

#1B1F7D #7D1B50 #7D791B #1B7D48

split-complementary

#1B1F7D #7D481B #507D1B

monochromatic

#050619 #10134B #1B1F7D #262BAF #3D43D5

Accessibility & contrast

On white

13.65

#1B1F7D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#1B1F7D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1F7D

13.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1F7D	#FFFFFF	#000000	##FFFFFF
##1B1F7D	1.00	13.65	1.54	13.65
#FFFFFF	13.65	1.00	21.00	1.00
#000000	1.54	21.00	1.00	21.00
##FFFFFF	13.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003280

Deuteranopia (green-blind)

#00297B

Tritanopia (blue-blind)

#003A4C

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1b1f7d;
/* rgb */ color: rgb(27, 31, 125);
/* oklch */ color: oklch(31.4% 0.154 271.5);

Tailwind

colors: {
  custom: {
    50: '#695ba4',
    500: '#1b1f7d',
    950: '#000000',
  },
}

SCSS

$custom: #1b1f7d;
$custom-light: #695ba4;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1f7d",
  "rgb": {
    "r": 27,
    "g": 31,
    "b": 125
  },
  "hsl": {
    "h": 237.551,
    "s": 64.474,
    "l": 29.804
  },
  "oklch": {
    "l": 0.31353,
    "c": 0.15381,
    "h": 271.5
  },
  "luminance": 0.02694
}

Semantic roles & 50–950 ramp

primary

#1B1F7D

secondary

#B1AC43

accent

#E140E7

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07040F

muted

#7A797F

Preview Lab

Preview with #1B1F7D

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

Preview Lab → · Contrast checker → · Palette generator →