#1B3574#1B3574

#1B3574 is a dark, moderate blue. Relative luminance 0.040; OKLCH L 34.8% C 0.113 H 264.4°. Best body text is #FFFFFF at 11.62:1 contrast (WCAG AA passes).

Color values

HEX	#1B3574
RGB	rgb(27, 53, 116)
HSL	hsl(222, 62%, 28%)
HSV	hsv(222, 77%, 45%)
CMYK	cmyk(76.7%, 54.3%, 0%, 54.5%)
CIE-LAB	lab(23.80, 14.23, -39.16)
CIE-LCH	lch(23.80, 41.67, 289.97°)
OKLab	oklab(34.82% -0.0111 -0.1127)
OKLCH	oklch(34.82% 0.113 264.4)
XYZ	xyz(4.8764, 4.0396, 17.0423)
Luminance	0.0404 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3574 #745A1B

analogous

#1B6174 #1B3574 #2D1B74

triadic

#1B3574 #741B35 #35741B

tetradic

#1B3574 #741B61 #745A1B #1B742D

square

#1B3574 #741B61 #745A1B #1B742D

split-complementary

#1B3574 #742D1B #61741B

monochromatic

#060B19 #0F1E42 #1B3574 #274CA6 #3965D1

Accessibility & contrast

On white

11.62

#1B3574 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.81

#1B3574 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3574

11.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3574	#FFFFFF	#000000	##FFFFFF
##1B3574	1.00	11.62	1.81	11.62
#FFFFFF	11.62	1.00	21.00	1.00
#000000	1.81	21.00	1.00	21.00
##FFFFFF	11.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0B3D76

Deuteranopia (green-blind)

#003573

Tritanopia (blue-blind)

#00444F

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #1b3574;
/* rgb */ color: rgb(27, 53, 116);
/* oklch */ color: oklch(34.8% 0.113 264.4);

Tailwind

colors: {
  custom: {
    50: '#656b9c',
    500: '#1b3574',
    950: '#000000',
  },
}

SCSS

$custom: #1b3574;
$custom-light: #656b9c;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3574",
  "rgb": {
    "r": 27,
    "g": 53,
    "b": 116
  },
  "hsl": {
    "h": 222.472,
    "s": 62.238,
    "l": 28.039
  },
  "oklch": {
    "l": 0.34815,
    "c": 0.1132,
    "h": 264.4
  },
  "luminance": 0.0404
}

Semantic roles & 50–950 ramp

primary

#1B3574

secondary

#A98B42

accent

#B642E5

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060E

muted

#7A7A7E

Preview Lab

Preview with #1B3574

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

Preview Lab → · Contrast checker → · Palette generator →