#1B4F8B#1B4F8B

#1B4F8B is a dark, moderate cyan. Relative luminance 0.077; OKLCH L 42.7% C 0.113 H 254.5°. Best body text is #FFFFFF at 8.27:1 contrast (WCAG AA passes).

Color values

HEX	#1B4F8B
RGB	rgb(27, 79, 139)
HSL	hsl(212, 67%, 33%)
HSV	hsv(212, 81%, 55%)
CMYK	cmyk(80.6%, 43.2%, 0%, 45.5%)
CIE-LAB	lab(33.32, 5.66, -38.22)
CIE-LCH	lch(33.32, 38.63, 278.42°)
OKLab	oklab(42.65% -0.0303 -0.1094)
OKLCH	oklch(42.65% 0.113 254.5)
XYZ	xyz(7.9064, 7.6881, 25.4883)
Luminance	0.0769 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4F8B #8B571B

analogous

#1B878B #1B4F8B #1F1B8B

triadic

#1B4F8B #8B1B4F #4F8B1B

tetradic

#1B4F8B #8B1B87 #8B571B #1B8B1F

square

#1B4F8B #8B1B87 #8B571B #1B8B1F

split-complementary

#1B4F8B #8B1F1B #878B1B

monochromatic

#071525 #113258 #1B4F8B #256CBE #458BDB

Accessibility & contrast

On white

8.27

#1B4F8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.54

#1B4F8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4F8B

8.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4F8B	#FFFFFF	#000000	##FFFFFF
##1B4F8B	1.00	8.27	2.54	8.27
#FFFFFF	8.27	1.00	21.00	1.00
#000000	2.54	21.00	1.00	21.00
##FFFFFF	8.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#31548D

Deuteranopia (green-blind)

#1D4A8A

Tritanopia (blue-blind)

#005D66

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #1b4f8b;
/* rgb */ color: rgb(27, 79, 139);
/* oklch */ color: oklch(42.7% 0.113 254.5);

Tailwind

colors: {
  custom: {
    50: '#6a7fad',
    500: '#1b4f8b',
    950: '#000000',
  },
}

SCSS

$custom: #1b4f8b;
$custom-light: #6a7fad;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4f8b",
  "rgb": {
    "r": 27,
    "g": 79,
    "b": 139
  },
  "hsl": {
    "h": 212.143,
    "s": 67.47,
    "l": 32.549
  },
  "oklch": {
    "l": 0.42651,
    "c": 0.11348,
    "h": 254.5
  },
  "luminance": 0.07689
}

Semantic roles & 50–950 ramp

primary

#1B4F8B

secondary

#BC8545

accent

#9A3DEA

background

#F6F7FA

surface

#ECEEF4

border

#C7C9CE

text

#070A10

muted

#7A7C7F

Preview Lab

Preview with #1B4F8B

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

Preview Lab → · Contrast checker → · Palette generator →