#1B5378#1B5378

#1B5378 is a dark, moderate cyan. Relative luminance 0.078; OKLCH L 42.4% C 0.084 H 241.9°. Best body text is #FFFFFF at 8.22:1 contrast (WCAG AA passes).

Color values

HEX	#1B5378
RGB	rgb(27, 83, 120)
HSL	hsl(204, 63%, 29%)
HSV	hsv(204, 78%, 47%)
CMYK	cmyk(77.5%, 30.8%, 0%, 52.9%)
CIE-LAB	lab(33.51, -4.48, -26.21)
CIE-LCH	lch(33.51, 26.59, 260.30°)
OKLab	oklab(42.44% -0.0396 -0.0741)
OKLCH	oklch(42.44% 0.084 241.9)
XYZ	xyz(6.9341, 7.7748, 18.9009)
Luminance	0.0778 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B5378 #78401B

analogous

#1B786F #1B5378 #1B2578

triadic

#1B5378 #781B53 #53781B

tetradic

#1B5378 #6F1B78 #78401B #25781B

square

#1B5378 #6F1B78 #78401B #25781B

split-complementary

#1B5378 #781B25 #786F1B

monochromatic

#061119 #103046 #1B5378 #2676AA #3B96D3

Accessibility & contrast

On white

8.22

#1B5378 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.56

#1B5378 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B5378

8.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B5378	#FFFFFF	#000000	##FFFFFF
##1B5378	1.00	8.22	2.56	8.22
#FFFFFF	8.22	1.00	21.00	1.00
#000000	2.56	21.00	1.00	21.00
##FFFFFF	8.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#42547A

Deuteranopia (green-blind)

#354B77

Tritanopia (blue-blind)

#005C60

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #1b5378;
/* rgb */ color: rgb(27, 83, 120);
/* oklch */ color: oklch(42.4% 0.084 241.9);

Tailwind

colors: {
  custom: {
    50: '#66839f',
    500: '#1b5378',
    950: '#000000',
  },
}

SCSS

$custom: #1b5378;
$custom-light: #66839f;
$custom-dark: #000000;

JSON

{
  "hex": "#1b5378",
  "rgb": {
    "r": 27,
    "g": 83,
    "b": 120
  },
  "hsl": {
    "h": 203.871,
    "s": 63.265,
    "l": 28.824
  },
  "oklch": {
    "l": 0.42443,
    "c": 0.08406,
    "h": 241.9
  },
  "luminance": 0.07776
}

Semantic roles & 50–950 ramp

primary

#1B5378

secondary

#AC6D43

accent

#8341E6

background

#F6F8F9

surface

#EBEFF2

border

#C6CACC

text

#060A0E

muted

#7A7C7E

Preview Lab

Preview with #1B5378

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

Preview Lab → · Contrast checker → · Palette generator →