#1B4D8B#1B4D8B

#1B4D8B is a dark, moderate cyan. Relative luminance 0.074; OKLCH L 42.2% C 0.116 H 255.8°. Best body text is #FFFFFF at 8.46:1 contrast (WCAG AA passes).

Color values

HEX	#1B4D8B
RGB	rgb(27, 77, 139)
HSL	hsl(213, 67%, 33%)
HSV	hsv(213, 81%, 55%)
CMYK	cmyk(80.6%, 44.6%, 0%, 45.5%)
CIE-LAB	lab(32.71, 7.00, -39.20)
CIE-LCH	lch(32.71, 39.82, 280.12°)
OKLab	oklab(42.17% -0.0285 -0.1123)
OKLCH	oklch(42.17% 0.116 255.8)
XYZ	xyz(7.7643, 7.4039, 25.4410)
Luminance	0.0741 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4D8B #8B591B

analogous

#1B858B #1B4D8B #211B8B

triadic

#1B4D8B #8B1B4D #4D8B1B

tetradic

#1B4D8B #8B1B85 #8B591B #1B8B21

square

#1B4D8B #8B1B85 #8B591B #1B8B21

split-complementary

#1B4D8B #8B211B #858B1B

monochromatic

#071425 #113158 #1B4D8B #2569BE #4588DB

Accessibility & contrast

On white

8.46

#1B4D8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.48

#1B4D8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4D8B

8.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4D8B	#FFFFFF	#000000	##FFFFFF
##1B4D8B	1.00	8.46	2.48	8.46
#FFFFFF	8.46	1.00	21.00	1.00
#000000	2.48	21.00	1.00	21.00
##FFFFFF	8.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E528D

Deuteranopia (green-blind)

#18488A

Tritanopia (blue-blind)

#005C65

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #1b4d8b;
/* rgb */ color: rgb(27, 77, 139);
/* oklch */ color: oklch(42.2% 0.116 255.8);

Tailwind

colors: {
  custom: {
    50: '#6a7ead',
    500: '#1b4d8b',
    950: '#000000',
  },
}

SCSS

$custom: #1b4d8b;
$custom-light: #6a7ead;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4d8b",
  "rgb": {
    "r": 27,
    "g": 77,
    "b": 139
  },
  "hsl": {
    "h": 213.214,
    "s": 67.47,
    "l": 32.549
  },
  "oklch": {
    "l": 0.42173,
    "c": 0.11586,
    "h": 255.8
  },
  "luminance": 0.07405
}

Semantic roles & 50–950 ramp

primary

#1B4D8B

secondary

#BC8745

accent

#9D3DEA

background

#F6F7FA

surface

#ECEEF4

border

#C7C9CE

text

#070910

muted

#7A7B7F

Preview Lab

Preview with #1B4D8B

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

Preview Lab → · Contrast checker → · Palette generator →