#1B4A91#1B4A91

#1B4A91 is a dark, vivid blue. Relative luminance 0.072; OKLCH L 41.9% C 0.128 H 258.8°. Best body text is #FFFFFF at 8.62:1 contrast (WCAG AA passes).

Color values

HEX	#1B4A91
RGB	rgb(27, 74, 145)
HSL	hsl(216, 69%, 34%)
HSV	hsv(216, 81%, 57%)
CMYK	cmyk(81.4%, 49%, 0%, 43.1%)
CIE-LAB	lab(32.20, 11.45, -43.69)
CIE-LCH	lch(32.20, 45.17, 284.69°)
OKLab	oklab(41.91% -0.0248 -0.1256)
OKLCH	oklch(41.91% 0.128 258.8)
XYZ	xyz(8.0097, 7.1739, 27.7451)
Luminance	0.0717 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4A91 #91621B

analogous

#1B8591 #1B4A91 #271B91

triadic

#1B4A91 #911B4A #4A911B

tetradic

#1B4A91 #911B85 #91621B #1B9127

square

#1B4A91 #911B85 #91621B #1B9127

split-complementary

#1B4A91 #91271B #85911B

monochromatic

#08152A #11305D #1B4A91 #2564C5 #4984DD

Accessibility & contrast

On white

8.62

#1B4A91 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.43

#1B4A91 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4A91

8.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4A91	#FFFFFF	#000000	##FFFFFF
##1B4A91	1.00	8.62	2.43	8.62
#FFFFFF	8.62	1.00	21.00	1.00
#000000	2.43	21.00	1.00	21.00
##FFFFFF	8.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#225194

Deuteranopia (green-blind)

#004790

Tritanopia (blue-blind)

#005B66

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #1b4a91;
/* rgb */ color: rgb(27, 74, 145);
/* oklch */ color: oklch(41.9% 0.128 258.8);

Tailwind

colors: {
  custom: {
    50: '#6b7bb2',
    500: '#1b4a91',
    950: '#000000',
  },
}

SCSS

$custom: #1b4a91;
$custom-light: #6b7bb2;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4a91",
  "rgb": {
    "r": 27,
    "g": 74,
    "b": 145
  },
  "hsl": {
    "h": 216.102,
    "s": 68.605,
    "l": 33.725
  },
  "oklch": {
    "l": 0.41907,
    "c": 0.128,
    "h": 258.8
  },
  "luminance": 0.07175
}

Semantic roles & 50–950 ramp

primary

#1B4A91

secondary

#BF9049

accent

#A63CEB

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#080911

muted

#7B7B80

Preview Lab

Preview with #1B4A91

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

Preview Lab → · Contrast checker → · Palette generator →