#1B2181#1B2181

#1B2181 is a dark, vivid blue. Relative luminance 0.029; OKLCH L 32.1% C 0.157 H 270.9°. Best body text is #FFFFFF at 13.28:1 contrast (WCAG AA passes).

Color values

HEX	#1B2181
RGB	rgb(27, 33, 129)
HSL	hsl(236, 65%, 31%)
HSV	hsv(236, 79%, 51%)
CMYK	cmyk(79.1%, 74.4%, 0%, 49.4%)
CIE-LAB	lab(19.66, 33.10, -54.19)
CIE-LCH	lch(19.66, 63.50, 301.42°)
OKLab	oklab(32.12% 0.0025 -0.1569)
OKLCH	oklch(32.12% 0.157 270.9)
XYZ	xyz(4.9570, 2.9052, 21.0641)
Luminance	0.0291 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2181 #817B1B

analogous

#1B5481 #1B2181 #481B81

triadic

#1B2181 #811B21 #21811B

tetradic

#1B2181 #811B54 #817B1B #1B8148

square

#1B2181 #811B54 #817B1B #1B8148

split-complementary

#1B2181 #81481B #54811B

monochromatic

#06071C #10144E #1B2181 #262EB4 #3F48D7

Accessibility & contrast

On white

13.28

#1B2181 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.58

#1B2181 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2181

13.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2181	#FFFFFF	#000000	##FFFFFF
##1B2181	1.00	13.28	1.58	13.28
#FFFFFF	13.28	1.00	21.00	1.00
#000000	1.58	21.00	1.00	21.00
##FFFFFF	13.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003584

Deuteranopia (green-blind)

#002B7F

Tritanopia (blue-blind)

#003C4F

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #1b2181;
/* rgb */ color: rgb(27, 33, 129);
/* oklch */ color: oklch(32.1% 0.157 270.9);

Tailwind

colors: {
  custom: {
    50: '#6a5da7',
    500: '#1b2181',
    950: '#000000',
  },
}

SCSS

$custom: #1b2181;
$custom-light: #6a5da7;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2181",
  "rgb": {
    "r": 27,
    "g": 33,
    "b": 129
  },
  "hsl": {
    "h": 236.471,
    "s": 65.385,
    "l": 30.588
  },
  "oklch": {
    "l": 0.3212,
    "c": 0.15691,
    "h": 270.9
  },
  "luminance": 0.02906
}

Semantic roles & 50–950 ramp

primary

#1B2181

secondary

#B5AE43

accent

#DE3FE8

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#080410

muted

#7A797F

Preview Lab

Preview with #1B2181

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

Preview Lab → · Contrast checker → · Palette generator →