#1B427A#1B427A

#1B427A is a dark, moderate blue. Relative luminance 0.055; OKLCH L 38.3% C 0.105 H 257.9°. Best body text is #FFFFFF at 9.97:1 contrast (WCAG AA passes).

Color values

HEX	#1B427A
RGB	rgb(27, 66, 122)
HSL	hsl(215, 64%, 29%)
HSV	hsv(215, 78%, 48%)
CMYK	cmyk(77.9%, 45.9%, 0%, 52.2%)
CIE-LAB	lab(28.20, 7.57, -35.87)
CIE-LCH	lch(28.20, 36.66, 281.91°)
OKLab	oklab(38.33% -0.022 -0.1027)
OKLCH	oklch(38.33% 0.105 257.9)
XYZ	xyz(5.9118, 5.5339, 19.1652)
Luminance	0.0554 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B427A #7A531B

analogous

#1B727A #1B427A #231B7A

triadic

#1B427A #7A1B42 #427A1B

tetradic

#1B427A #7A1B72 #7A531B #1B7A23

square

#1B427A #7A1B72 #7A531B #1B7A23

split-complementary

#1B427A #7A231B #727A1B

monochromatic

#060E19 #102748 #1B427A #265DAC #3C7AD4

Accessibility & contrast

On white

9.97

#1B427A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#1B427A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B427A

9.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B427A	#FFFFFF	#000000	##FFFFFF
##1B427A	1.00	9.97	2.11	9.97
#FFFFFF	9.97	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#26477C

Deuteranopia (green-blind)

#133E79

Tritanopia (blue-blind)

#004F58

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1b427a;
/* rgb */ color: rgb(27, 66, 122);
/* oklch */ color: oklch(38.3% 0.105 257.9);

Tailwind

colors: {
  custom: {
    50: '#6675a1',
    500: '#1b427a',
    950: '#000000',
  },
}

SCSS

$custom: #1b427a;
$custom-light: #6675a1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b427a",
  "rgb": {
    "r": 27,
    "g": 66,
    "b": 122
  },
  "hsl": {
    "h": 215.368,
    "s": 63.758,
    "l": 29.216
  },
  "oklch": {
    "l": 0.38327,
    "c": 0.10507,
    "h": 257.9
  },
  "luminance": 0.05535
}

Semantic roles & 50–950 ramp

primary

#1B427A

secondary

#AE8243

accent

#A341E7

background

#F6F7F9

surface

#EBEDF2

border

#C6C8CC

text

#07080F

muted

#7A7B7E

Preview Lab

Preview with #1B427A

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

Preview Lab → · Contrast checker → · Palette generator →