#1B2B8F#1B2B8F

#1B2B8F is a dark, vivid blue. Relative luminance 0.039; OKLCH L 35.3% C 0.164 H 268.6°. Best body text is #FFFFFF at 11.74:1 contrast (WCAG AA passes).

Color values

HEX	#1B2B8F
RGB	rgb(27, 43, 143)
HSL	hsl(232, 68%, 33%)
HSV	hsv(232, 81%, 56%)
CMYK	cmyk(81.1%, 69.9%, 0%, 43.9%)
CIE-LAB	lab(23.48, 31.87, -56.66)
CIE-LCH	lch(23.48, 65.00, 299.36°)
OKLab	oklab(35.32% -0.004 -0.1641)
OKLCH	oklch(35.32% 0.164 268.6)
XYZ	xyz(6.2721, 3.9432, 26.4118)
Luminance	0.0394 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2B8F #8F7F1B

analogous

#1B658F #1B2B8F #451B8F

triadic

#1B2B8F #8F1B2B #2B8F1B

tetradic

#1B2B8F #8F1B65 #8F7F1B #1B8F45

square

#1B2B8F #8F1B65 #8F7F1B #1B8F45

split-complementary

#1B2B8F #8F451B #658F1B

monochromatic

#080C28 #111C5C #1B2B8F #253AC2 #485CDC

Accessibility & contrast

On white

11.74

#1B2B8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.79

#1B2B8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2B8F

11.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2B8F	#FFFFFF	#000000	##FFFFFF
##1B2B8F	1.00	11.74	1.79	11.74
#FFFFFF	11.74	1.00	21.00	1.00
#000000	1.79	21.00	1.00	21.00
##FFFFFF	11.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003E92

Deuteranopia (green-blind)

#00328D

Tritanopia (blue-blind)

#004759

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1b2b8f;
/* rgb */ color: rgb(27, 43, 143);
/* oklch */ color: oklch(35.3% 0.164 268.6);

Tailwind

colors: {
  custom: {
    50: '#6d64b1',
    500: '#1b2b8f',
    950: '#000000',
  },
}

SCSS

$custom: #1b2b8f;
$custom-light: #6d64b1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2b8f",
  "rgb": {
    "r": 27,
    "g": 43,
    "b": 143
  },
  "hsl": {
    "h": 231.724,
    "s": 68.235,
    "l": 33.333
  },
  "oklch": {
    "l": 0.35319,
    "c": 0.16414,
    "h": 268.6
  },
  "luminance": 0.03944
}

Semantic roles & 50–950 ramp

primary

#1B2B8F

secondary

#BEAE48

accent

#D33DEB

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#080511

muted

#7B7A80

Preview Lab

Preview with #1B2B8F

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

Preview Lab → · Contrast checker → · Palette generator →