#1B4C83#1B4C83

#1B4C83 is a dark, moderate cyan. Relative luminance 0.070; OKLCH L 41.4% C 0.106 H 253.9°. Best body text is #FFFFFF at 8.72:1 contrast (WCAG AA passes).

Color values

HEX	#1B4C83
RGB	rgb(27, 76, 131)
HSL	hsl(212, 66%, 31%)
HSV	hsv(212, 79%, 51%)
CMYK	cmyk(79.4%, 42%, 0%, 48.6%)
CIE-LAB	lab(31.90, 4.43, -35.57)
CIE-LCH	lch(31.90, 35.85, 277.11°)
OKLab	oklab(41.38% -0.0294 -0.1017)
OKLCH	oklch(41.38% 0.106 253.9)
XYZ	xyz(7.1316, 7.0398, 22.4513)
Luminance	0.0704 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4C83 #83521B

analogous

#1B8083 #1B4C83 #1E1B83

triadic

#1B4C83 #831B4C #4C831B

tetradic

#1B4C83 #831B80 #83521B #1B831E

square

#1B4C83 #831B80 #83521B #1B831E

split-complementary

#1B4C83 #831E1B #80831B

monochromatic

#06111E #112F50 #1B4C83 #2569B6 #4188D8

Accessibility & contrast

On white

8.72

#1B4C83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.41

#1B4C83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4C83

8.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4C83	#FFFFFF	#000000	##FFFFFF
##1B4C83	1.00	8.72	2.41	8.72
#FFFFFF	8.72	1.00	21.00	1.00
#000000	2.41	21.00	1.00	21.00
##FFFFFF	8.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#315085

Deuteranopia (green-blind)

#204782

Tritanopia (blue-blind)

#005961

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #1b4c83;
/* rgb */ color: rgb(27, 76, 131);
/* oklch */ color: oklch(41.4% 0.106 253.9);

Tailwind

colors: {
  custom: {
    50: '#687da7',
    500: '#1b4c83',
    950: '#000000',
  },
}

SCSS

$custom: #1b4c83;
$custom-light: #687da7;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4c83",
  "rgb": {
    "r": 27,
    "g": 76,
    "b": 131
  },
  "hsl": {
    "h": 211.731,
    "s": 65.823,
    "l": 30.98
  },
  "oklch": {
    "l": 0.41379,
    "c": 0.10583,
    "h": 253.9
  },
  "luminance": 0.07041
}

Semantic roles & 50–950 ramp

primary

#1B4C83

secondary

#B68043

accent

#993FE9

background

#F6F7FA

surface

#EBEEF4

border

#C6C9CE

text

#07090F

muted

#7A7B7F

Preview Lab

Preview with #1B4C83

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

Preview Lab → · Contrast checker → · Palette generator →