#1B1E8B#1B1E8B

#1B1E8B is a dark, vivid blue. Relative luminance 0.030; OKLCH L 32.8% C 0.173 H 270.7°. Best body text is #FFFFFF at 13.08:1 contrast (WCAG AA passes).

Color values

HEX	#1B1E8B
RGB	rgb(27, 30, 139)
HSL	hsl(238, 67%, 33%)
HSV	hsv(238, 81%, 55%)
CMYK	cmyk(80.6%, 78.4%, 0%, 45.5%)
CIE-LAB	lab(20.14, 38.48, -59.68)
CIE-LCH	lch(20.14, 71.01, 302.81°)
OKLab	oklab(32.8% 0.002 -0.1728)
OKLCH	oklch(32.8% 0.173 270.7)
XYZ	xyz(5.5749, 3.0250, 24.7112)
Luminance	0.0303 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1E8B #8B881B

analogous

#1B568B #1B1E8B #501B8B

triadic

#1B1E8B #8B1B1E #1E8B1B

tetradic

#1B1E8B #8B1B56 #8B881B #1B8B50

square

#1B1E8B #8B1B56 #8B881B #1B8B50

split-complementary

#1B1E8B #8B501B #568B1B

monochromatic

#070825 #111358 #1B1E8B #2529BE #4549DB

Accessibility & contrast

On white

13.08

#1B1E8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.61

#1B1E8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1E8B

13.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1E8B	#FFFFFF	#000000	##FFFFFF
##1B1E8B	1.00	13.08	1.61	13.08
#FFFFFF	13.08	1.00	21.00	1.00
#000000	1.61	21.00	1.00	21.00
##FFFFFF	13.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00368E

Deuteranopia (green-blind)

#002B89

Tritanopia (blue-blind)

#003F53

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #1b1e8b;
/* rgb */ color: rgb(27, 30, 139);
/* oklch */ color: oklch(32.8% 0.173 270.7);

Tailwind

colors: {
  custom: {
    50: '#6d5cae',
    500: '#1b1e8b',
    950: '#000000',
  },
}

SCSS

$custom: #1b1e8b;
$custom-light: #6d5cae;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1e8b",
  "rgb": {
    "r": 27,
    "g": 30,
    "b": 139
  },
  "hsl": {
    "h": 238.393,
    "s": 67.47,
    "l": 32.549
  },
  "oklch": {
    "l": 0.32797,
    "c": 0.17283,
    "h": 270.7
  },
  "luminance": 0.03026
}

Semantic roles & 50–950 ramp

primary

#1B1E8B

secondary

#BCB945

accent

#E63DEA

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#080410

muted

#7B797F

Preview Lab

Preview with #1B1E8B

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

Preview Lab → · Contrast checker → · Palette generator →