#1B4F84#1B4F84

#1B4F84 is a dark, moderate cyan. Relative luminance 0.075; OKLCH L 42.2% C 0.104 H 252.1°. Best body text is #FFFFFF at 8.41:1 contrast (WCAG AA passes).

Color values

HEX	#1B4F84
RGB	rgb(27, 79, 132)
HSL	hsl(210, 66%, 31%)
HSV	hsv(210, 80%, 52%)
CMYK	cmyk(79.5%, 40.2%, 0%, 48.2%)
CIE-LAB	lab(32.90, 2.85, -34.60)
CIE-LCH	lch(32.90, 34.72, 274.70°)
OKLab	oklab(42.18% -0.032 -0.0987)
OKLCH	oklch(42.18% 0.104 252.1)
XYZ	xyz(7.4113, 7.4900, 22.8804)
Luminance	0.0749 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4F84 #84501B

analogous

#1B8384 #1B4F84 #1B1B84

triadic

#1B4F84 #841B4F #4F841B

tetradic

#1B4F84 #841B83 #84501B #1B841B

square

#1B4F84 #841B83 #84501B #1B841B

split-complementary

#1B4F84 #841B1B #83841B

monochromatic

#06121E #113151 #1B4F84 #256DB7 #418CD8

Accessibility & contrast

On white

8.41

#1B4F84 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.50

#1B4F84 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4F84

8.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4F84	#FFFFFF	#000000	##FFFFFF
##1B4F84	1.00	8.41	2.50	8.41
#FFFFFF	8.41	1.00	21.00	1.00
#000000	2.50	21.00	1.00	21.00
##FFFFFF	8.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#365386

Deuteranopia (green-blind)

#254983

Tritanopia (blue-blind)

#005C63

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #1b4f84;
/* rgb */ color: rgb(27, 79, 132);
/* oklch */ color: oklch(42.2% 0.104 252.1);

Tailwind

colors: {
  custom: {
    50: '#687fa8',
    500: '#1b4f84',
    950: '#000000',
  },
}

SCSS

$custom: #1b4f84;
$custom-light: #687fa8;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4f84",
  "rgb": {
    "r": 27,
    "g": 79,
    "b": 132
  },
  "hsl": {
    "h": 210.286,
    "s": 66.038,
    "l": 31.176
  },
  "oklch": {
    "l": 0.42179,
    "c": 0.10379,
    "h": 252.1
  },
  "luminance": 0.07491
}

Semantic roles & 50–950 ramp

primary

#1B4F84

secondary

#B77E43

accent

#953FE9

background

#F6F7FA

surface

#ECEEF4

border

#C7C9CE

text

#070A0F

muted

#7A7C7F

Preview Lab

Preview with #1B4F84

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

Preview Lab → · Contrast checker → · Palette generator →