#1B2D8E#1B2D8E

#1B2D8E is a dark, vivid blue. Relative luminance 0.041; OKLCH L 35.6% C 0.160 H 268.2°. Best body text is #FFFFFF at 11.59:1 contrast (WCAG AA passes).

Color values

HEX	#1B2D8E
RGB	rgb(27, 45, 142)
HSL	hsl(231, 68%, 33%)
HSV	hsv(231, 81%, 56%)
CMYK	cmyk(81%, 68.3%, 0%, 44.3%)
CIE-LAB	lab(23.88, 30.16, -55.39)
CIE-LCH	lch(23.88, 63.07, 298.57°)
OKLab	oklab(35.58% -0.005 -0.1604)
OKLCH	oklch(35.58% 0.16 268.2)
XYZ	xyz(6.2712, 4.0621, 26.0395)
Luminance	0.0406 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2D8E #8E7C1B

analogous

#1B668E #1B2D8E #431B8E

triadic

#1B2D8E #8E1B2D #2D8E1B

tetradic

#1B2D8E #8E1B66 #8E7C1B #1B8E43

square

#1B2D8E #8E1B66 #8E7C1B #1B8E43

split-complementary

#1B2D8E #8E431B #668E1B

monochromatic

#070C27 #111D5B #1B2D8E #253DC1 #475FDC

Accessibility & contrast

On white

11.59

#1B2D8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.81

#1B2D8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2D8E

11.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2D8E	#FFFFFF	#000000	##FFFFFF
##1B2D8E	1.00	11.59	1.81	11.59
#FFFFFF	11.59	1.00	21.00	1.00
#000000	1.81	21.00	1.00	21.00
##FFFFFF	11.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003E91

Deuteranopia (green-blind)

#00338C

Tritanopia (blue-blind)

#004759

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #1b2d8e;
/* rgb */ color: rgb(27, 45, 142);
/* oklch */ color: oklch(35.6% 0.160 268.2);

Tailwind

colors: {
  custom: {
    50: '#6d66b0',
    500: '#1b2d8e',
    950: '#000000',
  },
}

SCSS

$custom: #1b2d8e;
$custom-light: #6d66b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2d8e",
  "rgb": {
    "r": 27,
    "g": 45,
    "b": 142
  },
  "hsl": {
    "h": 230.609,
    "s": 68.047,
    "l": 33.137
  },
  "oklch": {
    "l": 0.35575,
    "c": 0.16047,
    "h": 268.2
  },
  "luminance": 0.04063
}

Semantic roles & 50–950 ramp

primary

#1B2D8E

secondary

#BEAB47

accent

#D03DEB

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#080611

muted

#7B7A80

Preview Lab

Preview with #1B2D8E

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

Preview Lab → · Contrast checker → · Palette generator →