#1B2D53#1B2D53

#1B2D53 is a dark, moderate blue. Relative luminance 0.027; OKLCH L 30.3% C 0.073 H 263.6°. Best body text is #FFFFFF at 13.58:1 contrast (WCAG AA passes).

Color values

HEX	#1B2D53
RGB	rgb(27, 45, 83)
HSL	hsl(221, 51%, 22%)
HSV	hsv(221, 67%, 33%)
CMYK	cmyk(67.5%, 45.8%, 0%, 67.5%)
CIE-LAB	lab(18.95, 6.52, -25.41)
CIE-LCH	lch(18.95, 26.23, 284.40°)
OKLab	oklab(30.34% -0.0082 -0.0724)
OKLCH	oklch(30.34% 0.073 263.6)
XYZ	xyz(2.9512, 2.7341, 8.5541)
Luminance	0.0273 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2D53 #53411B

analogous

#1B4953 #1B2D53 #251B53

triadic

#1B2D53 #531B2D #2D531B

tetradic

#1B2D53 #531B49 #53411B #1B5325

square

#1B2D53 #531B49 #53411B #1B5325

split-complementary

#1B2D53 #53251B #49531B

monochromatic

#080D17 #0C1425 #1B2D53 #2A4681 #395FAF

Accessibility & contrast

On white

13.58

#1B2D53 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.55

#1B2D53 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2D53

13.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2D53	#FFFFFF	#000000	##FFFFFF
##1B2D53	1.00	13.58	1.55	13.58
#FFFFFF	13.58	1.00	21.00	1.00
#000000	1.55	21.00	1.00	21.00
##FFFFFF	13.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C3154

Deuteranopia (green-blind)

#142C52

Tritanopia (blue-blind)

#00363C

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1b2d53;
/* rgb */ color: rgb(27, 45, 83);
/* oklch */ color: oklch(30.3% 0.073 263.6);

Tailwind

colors: {
  custom: {
    50: '#5e6583',
    500: '#1b2d53',
    950: '#000000',
  },
}

SCSS

$custom: #1b2d53;
$custom-light: #5e6583;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2d53",
  "rgb": {
    "r": 27,
    "g": 45,
    "b": 83
  },
  "hsl": {
    "h": 220.714,
    "s": 50.909,
    "l": 21.569
  },
  "oklch": {
    "l": 0.30342,
    "c": 0.07282,
    "h": 263.6
  },
  "luminance": 0.02734
}

Semantic roles & 50–950 ramp

primary

#1B2D53

secondary

#897241

accent

#AD4DDA

background

#F5F6F8

surface

#E9EBEF

border

#C5C6CA

text

#05050A

muted

#797A7C

Preview Lab

Preview with #1B2D53

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

Preview Lab → · Contrast checker → · Palette generator →