#1B2F9F#1B2F9F

#1B2F9F is a dark, vivid blue. Relative luminance 0.048; OKLCH L 37.7% C 0.180 H 267.7°. Best body text is #FFFFFF at 10.75:1 contrast (WCAG AA passes).

Color values

HEX	#1B2F9F
RGB	rgb(27, 47, 159)
HSL	hsl(231, 71%, 36%)
HSV	hsv(231, 83%, 62%)
CMYK	cmyk(83%, 70.4%, 0%, 37.6%)
CIE-LAB	lab(26.06, 35.26, -62.23)
CIE-LCH	lch(26.06, 71.53, 299.54°)
OKLab	oklab(37.68% -0.0073 -0.1803)
OKLCH	oklch(37.68% 0.18 267.7)
XYZ	xyz(7.7243, 4.7683, 33.3074)
Luminance	0.0477 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2F9F #9F8B1B

analogous

#1B719F #1B2F9F #491B9F

triadic

#1B2F9F #9F1B2F #2F9F1B

tetradic

#1B2F9F #9F1B71 #9F8B1B #1B9F49

square

#1B2F9F #9F1B71 #9F8B1B #1B9F49

split-complementary

#1B2F9F #9F491B #719F1B

monochromatic

#091036 #12206B #1B2F9F #243ED3 #5368E2

Accessibility & contrast

On white

10.75

#1B2F9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#1B2F9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2F9F

10.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2F9F	#FFFFFF	#000000	##FFFFFF
##1B2F9F	1.00	10.75	1.95	10.75
#FFFFFF	10.75	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0044A2

Deuteranopia (green-blind)

#00379D

Tritanopia (blue-blind)

#004E63

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1b2f9f;
/* rgb */ color: rgb(27, 47, 159);
/* oklch */ color: oklch(37.7% 0.180 267.7);

Tailwind

colors: {
  custom: {
    50: '#7168bc',
    500: '#1b2f9f',
    950: '#000000',
  },
}

SCSS

$custom: #1b2f9f;
$custom-light: #7168bc;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2f9f",
  "rgb": {
    "r": 27,
    "g": 47,
    "b": 159
  },
  "hsl": {
    "h": 230.909,
    "s": 70.968,
    "l": 36.471
  },
  "oklch": {
    "l": 0.37681,
    "c": 0.18049,
    "h": 267.7
  },
  "luminance": 0.04769
}

Semantic roles & 50–950 ramp

primary

#1B2F9F

secondary

#C5B351

accent

#D33AEE

background

#F7F6FB

surface

#EEEBF7

border

#C9C6D0

text

#090612

muted

#7B7A81

Preview Lab

Preview with #1B2F9F

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

Preview Lab → · Contrast checker → · Palette generator →