#1B217A#1B217A

#1B217A is a dark, vivid blue. Relative luminance 0.027; OKLCH L 31.4% C 0.148 H 271.3°. Best body text is #FFFFFF at 13.59:1 contrast (WCAG AA passes).

Color values

HEX	#1B217A
RGB	rgb(27, 33, 122)
HSL	hsl(236, 64%, 29%)
HSV	hsv(236, 78%, 48%)
CMYK	cmyk(77.9%, 73%, 0%, 52.2%)
CIE-LAB	lab(18.91, 30.51, -50.98)
CIE-LCH	lch(18.91, 59.41, 300.90°)
OKLab	oklab(31.36% 0.0035 -0.1475)
OKLCH	oklch(31.36% 0.148 271.3)
XYZ	xyz(4.5075, 2.7254, 18.6971)
Luminance	0.0273 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B217A #7A741B

analogous

#1B517A #1B217A #451B7A

triadic

#1B217A #7A1B21 #217A1B

tetradic

#1B217A #7A1B51 #7A741B #1B7A45

square

#1B217A #7A1B51 #7A741B #1B7A45

split-complementary

#1B217A #7A451B #517A1B

monochromatic

#060719 #101348 #1B217A #262FAC #3C45D4

Accessibility & contrast

On white

13.59

#1B217A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.55

#1B217A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B217A

13.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B217A	#FFFFFF	#000000	##FFFFFF
##1B217A	1.00	13.59	1.55	13.59
#FFFFFF	13.59	1.00	21.00	1.00
#000000	1.55	21.00	1.00	21.00
##FFFFFF	13.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00337D

Deuteranopia (green-blind)

#002978

Tritanopia (blue-blind)

#003A4B

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1b217a;
/* rgb */ color: rgb(27, 33, 122);
/* oklch */ color: oklch(31.4% 0.148 271.3);

Tailwind

colors: {
  custom: {
    50: '#685da1',
    500: '#1b217a',
    950: '#000000',
  },
}

SCSS

$custom: #1b217a;
$custom-light: #685da1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b217a",
  "rgb": {
    "r": 27,
    "g": 33,
    "b": 122
  },
  "hsl": {
    "h": 236.211,
    "s": 63.758,
    "l": 29.216
  },
  "oklch": {
    "l": 0.31356,
    "c": 0.14757,
    "h": 271.3
  },
  "luminance": 0.02726
}

Semantic roles & 50–950 ramp

primary

#1B217A

secondary

#AEA743

accent

#DC41E7

background

#F6F5FA

surface

#ECE9F3

border

#C7C5CD

text

#07040F

muted

#7A797F

Preview Lab

Preview with #1B217A

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

Preview Lab → · Contrast checker → · Palette generator →