#1A66B3#1A66B3

#1A66B3 is a mid, vivid cyan. Relative luminance 0.130; OKLCH L 50.8% C 0.141 H 253.1°. Best body text is #FFFFFF at 5.84:1 contrast (WCAG AA passes).

Color values

HEX	#1A66B3
RGB	rgb(26, 102, 179)
HSL	hsl(210, 75%, 40%)
HSV	hsv(210, 85%, 70%)
CMYK	cmyk(85.5%, 43%, 0%, 29.8%)
CIE-LAB	lab(42.73, 6.52, -47.11)
CIE-LCH	lch(42.73, 47.55, 277.89°)
OKLab	oklab(50.76% -0.0411 -0.135)
OKLCH	oklch(50.76% 0.141 253.1)
XYZ	xyz(13.3110, 12.9753, 44.4420)
Luminance	0.1298 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1A66B3 #B3671A

analogous

#1AB2B3 #1A66B3 #1A1AB3

triadic

#1A66B3 #B31A66 #66B31A

tetradic

#1A66B3 #B31AB2 #B3671A #1AB31A

square

#1A66B3 #B31AB2 #B3671A #1AB31A

split-complementary

#1A66B3 #B31A1A #B2B31A

monochromatic

#0A2948 #12487E #1A66B3 #2A85E0 #60A3E8

Accessibility & contrast

On white

5.84

#1A66B3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.60

#1A66B3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1A66B3

5.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1A66B3	#FFFFFF	#000000	##FFFFFF
##1A66B3	1.00	5.84	3.60	5.84
#FFFFFF	5.84	1.00	21.00	1.00
#000000	3.60	21.00	1.00	21.00
##FFFFFF	5.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3F6CB6

Deuteranopia (green-blind)

#215FB1

Tritanopia (blue-blind)

#007884

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #1a66b3;
/* rgb */ color: rgb(26, 102, 179);
/* oklch */ color: oklch(50.8% 0.141 253.1);

Tailwind

colors: {
  custom: {
    50: '#7391ca',
    500: '#1a66b3',
    950: '#000000',
  },
}

SCSS

$custom: #1a66b3;
$custom-light: #7391ca;
$custom-dark: #000000;

JSON

{
  "hex": "#1a66b3",
  "rgb": {
    "r": 26,
    "g": 102,
    "b": 179
  },
  "hsl": {
    "h": 210.196,
    "s": 74.634,
    "l": 40.196
  },
  "oklch": {
    "l": 0.50758,
    "c": 0.14114,
    "h": 253.1
  },
  "luminance": 0.12977
}

Semantic roles & 50–950 ramp

primary

#1A66B3

secondary

#CC955D

accent

#9537F1

background

#F7F8FC

surface

#EEF0F8

border

#C9CBD1

text

#090C13

muted

#7B7D82

Preview Lab

Preview with #1A66B3

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

Preview Lab → · Contrast checker → · Palette generator →