#1B2B88#1B2B88

#1B2B88 is a dark, vivid blue. Relative luminance 0.037; OKLCH L 34.6% C 0.155 H 268.7°. Best body text is #FFFFFF at 12.02:1 contrast (WCAG AA passes).

Color values

HEX	#1B2B88
RGB	rgb(27, 43, 136)
HSL	hsl(231, 67%, 32%)
HSV	hsv(231, 80%, 53%)
CMYK	cmyk(80.1%, 68.4%, 0%, 46.7%)
CIE-LAB	lab(22.78, 29.20, -53.45)
CIE-LCH	lch(22.78, 60.90, 298.65°)
OKLab	oklab(34.6% -0.0035 -0.1547)
OKLCH	oklch(34.6% 0.155 268.7)
XYZ	xyz(5.7583, 3.7377, 23.7057)
Luminance	0.0374 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2B88 #88781B

analogous

#1B6288 #1B2B88 #421B88

triadic

#1B2B88 #881B2B #2B881B

tetradic

#1B2B88 #881B62 #88781B #1B8842

square

#1B2B88 #881B62 #88781B #1B8842

split-complementary

#1B2B88 #88421B #62881B

monochromatic

#070B22 #111B55 #1B2B88 #253BBB #445ADA

Accessibility & contrast

On white

12.02

#1B2B88 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.75

#1B2B88 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2B88

12.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2B88	#FFFFFF	#000000	##FFFFFF
##1B2B88	1.00	12.02	1.75	12.02
#FFFFFF	12.02	1.00	21.00	1.00
#000000	1.75	21.00	1.00	21.00
##FFFFFF	12.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C8B

Deuteranopia (green-blind)

#003186

Tritanopia (blue-blind)

#004455

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #1b2b88;
/* rgb */ color: rgb(27, 43, 136);
/* oklch */ color: oklch(34.6% 0.155 268.7);

Tailwind

colors: {
  custom: {
    50: '#6b64ac',
    500: '#1b2b88',
    950: '#000000',
  },
}

SCSS

$custom: #1b2b88;
$custom-light: #6b64ac;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2b88",
  "rgb": {
    "r": 27,
    "g": 43,
    "b": 136
  },
  "hsl": {
    "h": 231.193,
    "s": 66.871,
    "l": 31.961
  },
  "oklch": {
    "l": 0.34599,
    "c": 0.15476,
    "h": 268.7
  },
  "luminance": 0.03738
}

Semantic roles & 50–950 ramp

primary

#1B2B88

secondary

#BBAA44

accent

#D13EEA

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080510

muted

#7B7A7F

Preview Lab

Preview with #1B2B88

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

Preview Lab → · Contrast checker → · Palette generator →