#1B3453#1B3453

#1B3453 is a dark, moderate cyan. Relative luminance 0.033; OKLCH L 32.1% C 0.064 H 254.7°. Best body text is #FFFFFF at 12.63:1 contrast (WCAG AA passes).

Color values

HEX	#1B3453
RGB	rgb(27, 52, 83)
HSL	hsl(213, 51%, 22%)
HSV	hsv(213, 67%, 33%)
CMYK	cmyk(67.5%, 37.3%, 0%, 67.5%)
CIE-LAB	lab(21.26, 1.54, -21.74)
CIE-LCH	lch(21.26, 21.80, 274.06°)
OKLab	oklab(32.14% -0.0168 -0.0615)
OKLCH	oklch(32.14% 0.064 254.7)
XYZ	xyz(3.2408, 3.3132, 8.6507)
Luminance	0.0331 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3453 #533A1B

analogous

#1B5053 #1B3453 #1E1B53

triadic

#1B3453 #531B34 #34531B

tetradic

#1B3453 #531B50 #533A1B #1B531E

square

#1B3453 #531B50 #533A1B #1B531E

split-complementary

#1B3453 #531E1B #50531B

monochromatic

#080E17 #0C1725 #1B3453 #2A5181 #396EAF

Accessibility & contrast

On white

12.63

#1B3453 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.66

#1B3453 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3453

12.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3453	#FFFFFF	#000000	##FFFFFF
##1B3453	1.00	12.63	1.66	12.63
#FFFFFF	12.63	1.00	21.00	1.00
#000000	1.66	21.00	1.00	21.00
##FFFFFF	12.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#273654

Deuteranopia (green-blind)

#1F3152

Tritanopia (blue-blind)

#003B3F

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #1b3453;
/* rgb */ color: rgb(27, 52, 83);
/* oklch */ color: oklch(32.1% 0.064 254.7);

Tailwind

colors: {
  custom: {
    50: '#5e6b83',
    500: '#1b3453',
    950: '#000000',
  },
}

SCSS

$custom: #1b3453;
$custom-light: #5e6b83;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3453",
  "rgb": {
    "r": 27,
    "g": 52,
    "b": 83
  },
  "hsl": {
    "h": 213.214,
    "s": 50.909,
    "l": 21.569
  },
  "oklch": {
    "l": 0.32136,
    "c": 0.06379,
    "h": 254.7
  },
  "luminance": 0.03314
}

Semantic roles & 50–950 ramp

primary

#1B3453

secondary

#896941

accent

#9B4DDA

background

#F5F6F8

surface

#E9EBEF

border

#C5C6CA

text

#05060A

muted

#797A7C

Preview Lab

Preview with #1B3453

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

Preview Lab → · Contrast checker → · Palette generator →