#1D5181#1D5181

#1D5181 is a dark, moderate cyan. Relative luminance 0.077; OKLCH L 42.5% C 0.097 H 249.7°. Best body text is #FFFFFF at 8.25:1 contrast (WCAG AA passes).

Color values

HEX	#1D5181
RGB	rgb(29, 81, 129)
HSL	hsl(209, 63%, 31%)
HSV	hsv(209, 78%, 51%)
CMYK	cmyk(77.5%, 37.2%, 0%, 49.4%)
CIE-LAB	lab(33.41, 0.60, -31.92)
CIE-LCH	lch(33.41, 31.93, 271.09°)
OKLab	oklab(42.54% -0.0335 -0.0908)
OKLCH	oklch(42.54% 0.097 249.7)
XYZ	xyz(7.4101, 7.7302, 21.8662)
Luminance	0.0773 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D5181 #814D1D

analogous

#1D817F #1D5181 #1D1F81

triadic

#1D5181 #811D51 #51811D

tetradic

#1D5181 #7F1D81 #814D1D #1F811D

square

#1D5181 #7F1D81 #814D1D #1F811D

split-complementary

#1D5181 #811D1F #817F1D

monochromatic

#07121D #12324F #1D5181 #2870B3 #448FD5

Accessibility & contrast

On white

8.25

#1D5181 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.55

#1D5181 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D5181

8.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D5181	#FFFFFF	#000000	##FFFFFF
##1D5181	1.00	8.25	2.55	8.25
#FFFFFF	8.25	1.00	21.00	1.00
#000000	2.55	21.00	1.00	21.00
##FFFFFF	8.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3B5483

Deuteranopia (green-blind)

#2C4A80

Tritanopia (blue-blind)

#005C63

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #1d5181;
/* rgb */ color: rgb(29, 81, 129);
/* oklch */ color: oklch(42.5% 0.097 249.7);

Tailwind

colors: {
  custom: {
    50: '#6881a6',
    500: '#1d5181',
    950: '#000000',
  },
}

SCSS

$custom: #1d5181;
$custom-light: #6881a6;
$custom-dark: #000000;

JSON

{
  "hex": "#1d5181",
  "rgb": {
    "r": 29,
    "g": 81,
    "b": 129
  },
  "hsl": {
    "h": 208.8,
    "s": 63.291,
    "l": 30.98
  },
  "oklch": {
    "l": 0.42544,
    "c": 0.09683,
    "h": 249.7
  },
  "luminance": 0.07731
}

Semantic roles & 50–950 ramp

primary

#1D5181

secondary

#B47B46

accent

#9141E6

background

#F6F7FA

surface

#EBEEF4

border

#C6C9CE

text

#070A0F

muted

#7A7C7F

Preview Lab

Preview with #1D5181

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

Preview Lab → · Contrast checker → · Palette generator →