#1B2574#1B2574

#1B2574 is a dark, vivid blue. Relative luminance 0.028; OKLCH L 31.4% C 0.134 H 270.7°. Best body text is #FFFFFF at 13.43:1 contrast (WCAG AA passes).

Color values

HEX	#1B2574
RGB	rgb(27, 37, 116)
HSL	hsl(233, 62%, 28%)
HSV	hsv(233, 77%, 45%)
CMYK	cmyk(76.7%, 68.1%, 0%, 54.5%)
CIE-LAB	lab(19.29, 25.54, -46.50)
CIE-LCH	lch(19.29, 53.05, 298.78°)
OKLab	oklab(31.45% 0.0016 -0.1344)
OKLCH	oklch(31.45% 0.134 270.7)
XYZ	xyz(4.2649, 2.8167, 16.8385)
Luminance	0.0282 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2574 #746A1B

analogous

#1B5274 #1B2574 #3D1B74

triadic

#1B2574 #741B25 #25741B

tetradic

#1B2574 #741B52 #746A1B #1B743D

square

#1B2574 #741B52 #746A1B #1B743D

split-complementary

#1B2574 #743D1B #52741B

monochromatic

#060819 #0F1542 #1B2574 #2735A6 #394AD1

Accessibility & contrast

On white

13.43

#1B2574 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.56

#1B2574 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2574

13.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2574	#FFFFFF	#000000	##FFFFFF
##1B2574	1.00	13.43	1.56	13.43
#FFFFFF	13.43	1.00	21.00	1.00
#000000	1.56	21.00	1.00	21.00
##FFFFFF	13.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003376

Deuteranopia (green-blind)

#002B73

Tritanopia (blue-blind)

#003A49

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1b2574;
/* rgb */ color: rgb(27, 37, 116);
/* oklch */ color: oklch(31.4% 0.134 270.7);

Tailwind

colors: {
  custom: {
    50: '#665f9d',
    500: '#1b2574',
    950: '#000000',
  },
}

SCSS

$custom: #1b2574;
$custom-light: #665f9d;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2574",
  "rgb": {
    "r": 27,
    "g": 37,
    "b": 116
  },
  "hsl": {
    "h": 233.258,
    "s": 62.238,
    "l": 28.039
  },
  "oklch": {
    "l": 0.3145,
    "c": 0.13445,
    "h": 270.7
  },
  "luminance": 0.02817
}

Semantic roles & 50–950 ramp

primary

#1B2574

secondary

#A99D42

accent

#D342E5

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07040E

muted

#7A797E

Preview Lab

Preview with #1B2574

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

Preview Lab → · Contrast checker → · Palette generator →