#1B4B91#1B4B91

#1B4B91 is a dark, vivid blue. Relative luminance 0.073; OKLCH L 42.1% C 0.127 H 258.4°. Best body text is #FFFFFF at 8.53:1 contrast (WCAG AA passes).

Color values

HEX	#1B4B91
RGB	rgb(27, 75, 145)
HSL	hsl(216, 69%, 34%)
HSV	hsv(216, 81%, 57%)
CMYK	cmyk(81.4%, 48.3%, 0%, 43.1%)
CIE-LAB	lab(32.50, 10.78, -43.21)
CIE-LCH	lch(32.50, 44.53, 284.00°)
OKLab	oklab(42.14% -0.0256 -0.1241)
OKLCH	oklch(42.14% 0.127 258.4)
XYZ	xyz(8.0770, 7.3085, 27.7676)
Luminance	0.0731 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4B91 #91611B

analogous

#1B8691 #1B4B91 #261B91

triadic

#1B4B91 #911B4B #4B911B

tetradic

#1B4B91 #911B86 #91611B #1B9126

square

#1B4B91 #911B86 #91611B #1B9126

split-complementary

#1B4B91 #91261B #86911B

monochromatic

#08162A #11305D #1B4B91 #2566C5 #4985DD

Accessibility & contrast

On white

8.53

#1B4B91 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.46

#1B4B91 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4B91

8.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4B91	#FFFFFF	#000000	##FFFFFF
##1B4B91	1.00	8.53	2.46	8.53
#FFFFFF	8.53	1.00	21.00	1.00
#000000	2.46	21.00	1.00	21.00
##FFFFFF	8.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#245294

Deuteranopia (green-blind)

#004790

Tritanopia (blue-blind)

#005C67

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #1b4b91;
/* rgb */ color: rgb(27, 75, 145);
/* oklch */ color: oklch(42.1% 0.127 258.4);

Tailwind

colors: {
  custom: {
    50: '#6b7cb2',
    500: '#1b4b91',
    950: '#000000',
  },
}

SCSS

$custom: #1b4b91;
$custom-light: #6b7cb2;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4b91",
  "rgb": {
    "r": 27,
    "g": 75,
    "b": 145
  },
  "hsl": {
    "h": 215.593,
    "s": 68.605,
    "l": 33.725
  },
  "oklch": {
    "l": 0.42138,
    "c": 0.12675,
    "h": 258.4
  },
  "luminance": 0.07309
}

Semantic roles & 50–950 ramp

primary

#1B4B91

secondary

#BF8F49

accent

#A43CEB

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080911

muted

#7B7B80

Preview Lab

Preview with #1B4B91

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

Preview Lab → · Contrast checker → · Palette generator →