#1B3D64#1B3D64

#1B3D64 is a dark, moderate cyan. Relative luminance 0.045; OKLCH L 35.6% C 0.079 H 253.6°. Best body text is #FFFFFF at 11.06:1 contrast (WCAG AA passes).

Color values

HEX	#1B3D64
RGB	rgb(27, 61, 100)
HSL	hsl(212, 57%, 25%)
HSV	hsv(212, 73%, 39%)
CMYK	cmyk(73%, 39%, 0%, 60.8%)
CIE-LAB	lab(25.23, 2.09, -26.60)
CIE-LCH	lch(25.23, 26.68, 274.49°)
OKLab	oklab(35.57% -0.0223 -0.0756)
OKLCH	oklch(35.57% 0.079 253.6)
XYZ	xyz(4.4201, 4.4901, 12.6879)
Luminance	0.0449 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3D64 #64421B

analogous

#1B6164 #1B3D64 #1E1B64

triadic

#1B3D64 #641B3D #3D641B

tetradic

#1B3D64 #641B61 #64421B #1B641E

square

#1B3D64 #641B61 #64421B #1B641E

split-complementary

#1B3D64 #641E1B #61641B

monochromatic

#070F18 #0E2034 #1B3D64 #285A94 #3578C4

Accessibility & contrast

On white

11.06

#1B3D64 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#1B3D64 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3D64

11.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3D64	#FFFFFF	#000000	##FFFFFF
##1B3D64	1.00	11.06	1.90	11.06
#FFFFFF	11.06	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C4066

Deuteranopia (green-blind)

#213963

Tritanopia (blue-blind)

#00464B

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #1b3d64;
/* rgb */ color: rgb(27, 61, 100);
/* oklch */ color: oklch(35.6% 0.079 253.6);

Tailwind

colors: {
  custom: {
    50: '#617290',
    500: '#1b3d64',
    950: '#000000',
  },
}

SCSS

$custom: #1b3d64;
$custom-light: #617290;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3d64",
  "rgb": {
    "r": 27,
    "g": 61,
    "b": 100
  },
  "hsl": {
    "h": 212.055,
    "s": 57.48,
    "l": 24.902
  },
  "oklch": {
    "l": 0.35567,
    "c": 0.07885,
    "h": 253.6
  },
  "luminance": 0.04491
}

Semantic roles & 50–950 ramp

primary

#1B3D64

secondary

#997041

accent

#9947E1

background

#F6F6F8

surface

#EBECF0

border

#C6C7CB

text

#05070C

muted

#7A7A7D

Preview Lab

Preview with #1B3D64

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

Preview Lab → · Contrast checker → · Palette generator →