#1D66B3#1D66B3

#1D66B3 is a mid, vivid cyan. Relative luminance 0.130; OKLCH L 50.8% C 0.140 H 253.5°. Best body text is #FFFFFF at 5.83:1 contrast (WCAG AA passes).

Color values

HEX	#1D66B3
RGB	rgb(29, 102, 179)
HSL	hsl(211, 72%, 41%)
HSV	hsv(211, 84%, 70%)
CMYK	cmyk(83.8%, 43%, 0%, 29.8%)
CIE-LAB	lab(42.79, 6.78, -47.00)
CIE-LCH	lch(42.79, 47.49, 278.20°)
OKLab	oklab(50.83% -0.0398 -0.1347)
OKLCH	oklch(50.83% 0.14 253.5)
XYZ	xyz(13.3917, 13.0170, 44.4458)
Luminance	0.1302 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D66B3 #B36A1D

analogous

#1DB1B3 #1D66B3 #1F1DB3

triadic

#1D66B3 #B31D66 #66B31D

tetradic

#1D66B3 #B31DB1 #B36A1D #1DB31F

square

#1D66B3 #B31DB1 #B36A1D #1DB31F

split-complementary

#1D66B3 #B31F1D #B1B31D

monochromatic

#0C2A4A #14487E #1D66B3 #3084DD #64A3E6

Accessibility & contrast

On white

5.83

#1D66B3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.60

#1D66B3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1D66B3

5.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D66B3	#FFFFFF	#000000	##FFFFFF
##1D66B3	1.00	5.83	3.60	5.83
#FFFFFF	5.83	1.00	21.00	1.00
#000000	3.60	21.00	1.00	21.00
##FFFFFF	5.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3F6CB6

Deuteranopia (green-blind)

#225FB1

Tritanopia (blue-blind)

#007884

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #1d66b3;
/* rgb */ color: rgb(29, 102, 179);
/* oklch */ color: oklch(50.8% 0.140 253.5);

Tailwind

colors: {
  custom: {
    50: '#7391ca',
    500: '#1d66b3',
    950: '#000000',
  },
}

SCSS

$custom: #1d66b3;
$custom-light: #7391ca;
$custom-dark: #000000;

JSON

{
  "hex": "#1d66b3",
  "rgb": {
    "r": 29,
    "g": 102,
    "b": 179
  },
  "hsl": {
    "h": 210.8,
    "s": 72.115,
    "l": 40.784
  },
  "oklch": {
    "l": 0.50825,
    "c": 0.14045,
    "h": 253.5
  },
  "luminance": 0.13019
}

Semantic roles & 50–950 ramp

primary

#1D66B3

secondary

#CB9761

accent

#9639EF

background

#F7F8FC

surface

#EEF0F8

border

#C9CBD1

text

#0A0C13

muted

#7C7D82

Preview Lab

Preview with #1D66B3

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

Preview Lab → · Contrast checker → · Palette generator →