#1B3572#1B3572

#1B3572 is a dark, moderate blue. Relative luminance 0.040; OKLCH L 34.7% C 0.110 H 264.1°. Best body text is #FFFFFF at 11.67:1 contrast (WCAG AA passes).

Color values

HEX	#1B3572
RGB	rgb(27, 53, 114)
HSL	hsl(222, 62%, 28%)
HSV	hsv(222, 76%, 45%)
CMYK	cmyk(76.3%, 53.5%, 0%, 55.3%)
CIE-LAB	lab(23.65, 13.41, -38.13)
CIE-LCH	lch(23.65, 40.42, 289.38°)
OKLab	oklab(34.65% -0.0113 -0.1096)
OKLCH	oklch(34.65% 0.11 264.1)
XYZ	xyz(4.7613, 3.9936, 16.4362)
Luminance	0.0399 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3572 #72581B

analogous

#1B6072 #1B3572 #2D1B72

triadic

#1B3572 #721B35 #35721B

tetradic

#1B3572 #721B60 #72581B #1B722D

square

#1B3572 #721B60 #72581B #1B722D

split-complementary

#1B3572 #722D1B #60721B

monochromatic

#060C19 #0F1E41 #1B3572 #274CA3 #3865D0

Accessibility & contrast

On white

11.67

#1B3572 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#1B3572 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3572

11.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3572	#FFFFFF	#000000	##FFFFFF
##1B3572	1.00	11.67	1.80	11.67
#FFFFFF	11.67	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0F3D74

Deuteranopia (green-blind)

#003571

Tritanopia (blue-blind)

#00444E

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1b3572;
/* rgb */ color: rgb(27, 53, 114);
/* oklch */ color: oklch(34.7% 0.110 264.1);

Tailwind

colors: {
  custom: {
    50: '#656b9b',
    500: '#1b3572',
    950: '#000000',
  },
}

SCSS

$custom: #1b3572;
$custom-light: #656b9b;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3572",
  "rgb": {
    "r": 27,
    "g": 53,
    "b": 114
  },
  "hsl": {
    "h": 222.069,
    "s": 61.702,
    "l": 27.647
  },
  "oklch": {
    "l": 0.34651,
    "c": 0.1102,
    "h": 264.1
  },
  "luminance": 0.03994
}

Semantic roles & 50–950 ramp

primary

#1B3572

secondary

#A78942

accent

#B443E5

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060E

muted

#7A7A7E

Preview Lab

Preview with #1B3572

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

Preview Lab → · Contrast checker → · Palette generator →