#1B4A8D#1B4A8D

#1B4A8D is a dark, vivid blue. Relative luminance 0.071; OKLCH L 41.6% C 0.122 H 258.0°. Best body text is #FFFFFF at 8.71:1 contrast (WCAG AA passes).

Color values

HEX	#1B4A8D
RGB	rgb(27, 74, 141)
HSL	hsl(215, 68%, 33%)
HSV	hsv(215, 81%, 55%)
CMYK	cmyk(80.9%, 47.5%, 0%, 44.7%)
CIE-LAB	lab(31.93, 9.83, -41.68)
CIE-LCH	lch(31.93, 42.83, 283.27°)
OKLab	oklab(41.61% -0.0255 -0.1197)
OKLCH	oklch(41.61% 0.122 258)
XYZ	xyz(7.7067, 7.0527, 26.1493)
Luminance	0.0705 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4A8D #8D5E1B

analogous

#1B838D #1B4A8D #251B8D

triadic

#1B4A8D #8D1B4A #4A8D1B

tetradic

#1B4A8D #8D1B83 #8D5E1B #1B8D25

square

#1B4A8D #8D1B83 #8D5E1B #1B8D25

split-complementary

#1B4A8D #8D251B #838D1B

monochromatic

#071426 #112F5A #1B4A8D #2565C0 #4784DC

Accessibility & contrast

On white

8.71

#1B4A8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.41

#1B4A8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4A8D

8.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4A8D	#FFFFFF	#000000	##FFFFFF
##1B4A8D	1.00	8.71	2.41	8.71
#FFFFFF	8.71	1.00	21.00	1.00
#000000	2.41	21.00	1.00	21.00
##FFFFFF	8.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#265190

Deuteranopia (green-blind)

#07468C

Tritanopia (blue-blind)

#005A64

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #1b4a8d;
/* rgb */ color: rgb(27, 74, 141);
/* oklch */ color: oklch(41.6% 0.122 258.0);

Tailwind

colors: {
  custom: {
    50: '#6a7baf',
    500: '#1b4a8d',
    950: '#000000',
  },
}

SCSS

$custom: #1b4a8d;
$custom-light: #6a7baf;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4a8d",
  "rgb": {
    "r": 27,
    "g": 74,
    "b": 141
  },
  "hsl": {
    "h": 215.263,
    "s": 67.857,
    "l": 32.941
  },
  "oklch": {
    "l": 0.4161,
    "c": 0.12235,
    "h": 258
  },
  "luminance": 0.07054
}

Semantic roles & 50–950 ramp

primary

#1B4A8D

secondary

#BD8C46

accent

#A33DEB

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#080910

muted

#7A7B7F

Preview Lab

Preview with #1B4A8D

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

Preview Lab → · Contrast checker → · Palette generator →