#1B2572#1B2572

#1B2572 is a dark, vivid blue. Relative luminance 0.028; OKLCH L 31.2% C 0.132 H 270.8°. Best body text is #FFFFFF at 13.51:1 contrast (WCAG AA passes).

Color values

HEX	#1B2572
RGB	rgb(27, 37, 114)
HSL	hsl(233, 62%, 28%)
HSV	hsv(233, 76%, 45%)
CMYK	cmyk(76.3%, 67.5%, 0%, 55.3%)
CIE-LAB	lab(19.10, 24.77, -45.53)
CIE-LCH	lch(19.10, 51.83, 298.54°)
OKLab	oklab(31.25% 0.0018 -0.1316)
OKLCH	oklch(31.25% 0.132 270.8)
XYZ	xyz(4.1498, 2.7706, 16.2324)
Luminance	0.0277 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2572 #72681B

analogous

#1B5172 #1B2572 #3C1B72

triadic

#1B2572 #721B25 #25721B

tetradic

#1B2572 #721B51 #72681B #1B723C

square

#1B2572 #721B51 #72681B #1B723C

split-complementary

#1B2572 #723C1B #51721B

monochromatic

#060819 #0F1541 #1B2572 #2735A3 #3849D0

Accessibility & contrast

On white

13.51

#1B2572 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.55

#1B2572 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2572

13.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2572	#FFFFFF	#000000	##FFFFFF
##1B2572	1.00	13.51	1.55	13.51
#FFFFFF	13.51	1.00	21.00	1.00
#000000	1.55	21.00	1.00	21.00
##FFFFFF	13.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003274

Deuteranopia (green-blind)

#002A71

Tritanopia (blue-blind)

#003948

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1b2572;
/* rgb */ color: rgb(27, 37, 114);
/* oklch */ color: oklch(31.2% 0.132 270.8);

Tailwind

colors: {
  custom: {
    50: '#665f9b',
    500: '#1b2572',
    950: '#000000',
  },
}

SCSS

$custom: #1b2572;
$custom-light: #665f9b;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2572",
  "rgb": {
    "r": 27,
    "g": 37,
    "b": 114
  },
  "hsl": {
    "h": 233.103,
    "s": 61.702,
    "l": 27.647
  },
  "oklch": {
    "l": 0.31249,
    "c": 0.13161,
    "h": 270.8
  },
  "luminance": 0.02771
}

Semantic roles & 50–950 ramp

primary

#1B2572

secondary

#A79B42

accent

#D243E5

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07040E

muted

#7A797E

Preview Lab

Preview with #1B2572

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

Preview Lab → · Contrast checker → · Palette generator →