#1B4E8B#1B4E8B

#1B4E8B is a dark, moderate cyan. Relative luminance 0.075; OKLCH L 42.4% C 0.115 H 255.2°. Best body text is #FFFFFF at 8.37:1 contrast (WCAG AA passes).

Color values

HEX	#1B4E8B
RGB	rgb(27, 78, 139)
HSL	hsl(213, 67%, 33%)
HSV	hsv(213, 81%, 55%)
CMYK	cmyk(80.6%, 43.9%, 0%, 45.5%)
CIE-LAB	lab(33.02, 6.33, -38.71)
CIE-LCH	lch(33.02, 39.22, 279.28°)
OKLab	oklab(42.41% -0.0294 -0.1108)
OKLCH	oklch(42.41% 0.115 255.2)
XYZ	xyz(7.8349, 7.5449, 25.4645)
Luminance	0.0755 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4E8B #8B581B

analogous

#1B868B #1B4E8B #201B8B

triadic

#1B4E8B #8B1B4E #4E8B1B

tetradic

#1B4E8B #8B1B86 #8B581B #1B8B20

square

#1B4E8B #8B1B86 #8B581B #1B8B20

split-complementary

#1B4E8B #8B201B #868B1B

monochromatic

#071425 #113158 #1B4E8B #256BBE #458ADB

Accessibility & contrast

On white

8.37

#1B4E8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#1B4E8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4E8B

8.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4E8B	#FFFFFF	#000000	##FFFFFF
##1B4E8B	1.00	8.37	2.51	8.37
#FFFFFF	8.37	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F538D

Deuteranopia (green-blind)

#1B498A

Tritanopia (blue-blind)

#005C65

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #1b4e8b;
/* rgb */ color: rgb(27, 78, 139);
/* oklch */ color: oklch(42.4% 0.115 255.2);

Tailwind

colors: {
  custom: {
    50: '#6a7fad',
    500: '#1b4e8b',
    950: '#000000',
  },
}

SCSS

$custom: #1b4e8b;
$custom-light: #6a7fad;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4e8b",
  "rgb": {
    "r": 27,
    "g": 78,
    "b": 139
  },
  "hsl": {
    "h": 212.679,
    "s": 67.47,
    "l": 32.549
  },
  "oklch": {
    "l": 0.42411,
    "c": 0.11467,
    "h": 255.2
  },
  "luminance": 0.07546
}

Semantic roles & 50–950 ramp

primary

#1B4E8B

secondary

#BC8645

accent

#9C3DEA

background

#F6F7FA

surface

#ECEEF4

border

#C7C9CE

text

#070A10

muted

#7A7C7F

Preview Lab

Preview with #1B4E8B

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

Preview Lab → · Contrast checker → · Palette generator →