#1B4F83#1B4F83

#1B4F83 is a dark, moderate cyan. Relative luminance 0.075; OKLCH L 42.1% C 0.102 H 251.7°. Best body text is #FFFFFF at 8.42:1 contrast (WCAG AA passes).

Color values

HEX	#1B4F83
RGB	rgb(27, 79, 131)
HSL	hsl(210, 66%, 31%)
HSV	hsv(210, 79%, 51%)
CMYK	cmyk(79.4%, 39.7%, 0%, 48.6%)
CIE-LAB	lab(32.84, 2.44, -34.08)
CIE-LCH	lch(32.84, 34.16, 274.10°)
OKLab	oklab(42.11% -0.0322 -0.0972)
OKLCH	oklch(42.11% 0.102 251.7)
XYZ	xyz(7.3432, 7.4628, 22.5218)
Luminance	0.0746 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4F83 #834F1B

analogous

#1B8383 #1B4F83 #1B1B83

triadic

#1B4F83 #831B4F #4F831B

tetradic

#1B4F83 #831B83 #834F1B #1B831B

square

#1B4F83 #831B83 #834F1B #1B831B

split-complementary

#1B4F83 #831B1B #83831B

monochromatic

#06121E #113050 #1B4F83 #256EB6 #418CD8

Accessibility & contrast

On white

8.42

#1B4F83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#1B4F83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4F83

8.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4F83	#FFFFFF	#000000	##FFFFFF
##1B4F83	1.00	8.42	2.49	8.42
#FFFFFF	8.42	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#365285

Deuteranopia (green-blind)

#264982

Tritanopia (blue-blind)

#005B62

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #1b4f83;
/* rgb */ color: rgb(27, 79, 131);
/* oklch */ color: oklch(42.1% 0.102 251.7);

Tailwind

colors: {
  custom: {
    50: '#687fa7',
    500: '#1b4f83',
    950: '#000000',
  },
}

SCSS

$custom: #1b4f83;
$custom-light: #687fa7;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4f83",
  "rgb": {
    "r": 27,
    "g": 79,
    "b": 131
  },
  "hsl": {
    "h": 210,
    "s": 65.823,
    "l": 30.98
  },
  "oklch": {
    "l": 0.42113,
    "c": 0.10242,
    "h": 251.7
  },
  "luminance": 0.07464
}

Semantic roles & 50–950 ramp

primary

#1B4F83

secondary

#B67D43

accent

#943FE9

background

#F6F7FA

surface

#EBEEF4

border

#C6C9CE

text

#070A0F

muted

#7A7C7F

Preview Lab

Preview with #1B4F83

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

Preview Lab → · Contrast checker → · Palette generator →