#1C66BC#1C66BC

#1C66BC is a mid, vivid cyan. Relative luminance 0.134; OKLCH L 51.4% C 0.153 H 255.4°. Best body text is #FFFFFF at 5.71:1 contrast (WCAG AA passes).

Color values

HEX	#1C66BC
RGB	rgb(28, 102, 188)
HSL	hsl(212, 74%, 42%)
HSV	hsv(212, 85%, 74%)
CMYK	cmyk(85.1%, 45.7%, 0%, 26.3%)
CIE-LAB	lab(43.33, 10.23, -51.39)
CIE-LCH	lch(43.33, 52.39, 281.26°)
OKLab	oklab(51.42% -0.0384 -0.1476)
OKLCH	oklch(51.42% 0.153 255.4)
XYZ	xyz(14.3040, 13.3787, 49.3956)
Luminance	0.1338 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C66BC #BC721C

analogous

#1CB6BC #1C66BC #221CBC

triadic

#1C66BC #BC1C66 #66BC1C

tetradic

#1C66BC #BC1CB6 #BC721C #1CBC22

square

#1C66BC #BC1CB6 #BC721C #1CBC22

split-complementary

#1C66BC #BC221C #B6BC1C

monochromatic

#0C2C51 #144987 #1C66BC #3484E1 #6AA4E9

Accessibility & contrast

On white

5.71

#1C66BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.68

#1C66BC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1C66BC

5.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C66BC	#FFFFFF	#000000	##FFFFFF
##1C66BC	1.00	5.71	3.68	5.71
#FFFFFF	5.71	1.00	21.00	1.00
#000000	3.68	21.00	1.00	21.00
##FFFFFF	5.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#376EBF

Deuteranopia (green-blind)

#0D60BA

Tritanopia (blue-blind)

#007B88

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #1c66bc;
/* rgb */ color: rgb(28, 102, 188);
/* oklch */ color: oklch(51.4% 0.153 255.4);

Tailwind

colors: {
  custom: {
    50: '#7591d1',
    500: '#1c66bc',
    950: '#000000',
  },
}

SCSS

$custom: #1c66bc;
$custom-light: #7591d1;
$custom-dark: #000000;

JSON

{
  "hex": "#1c66bc",
  "rgb": {
    "r": 28,
    "g": 102,
    "b": 188
  },
  "hsl": {
    "h": 212.25,
    "s": 74.074,
    "l": 42.353
  },
  "oklch": {
    "l": 0.51418,
    "c": 0.15251,
    "h": 255.4
  },
  "luminance": 0.1338
}

Semantic roles & 50–950 ramp

primary

#1C66BC

secondary

#CE9E65

accent

#9B37F1

background

#F7F8FC

surface

#EEF0F9

border

#C9CBD2

text

#0A0C14

muted

#7C7D82

Preview Lab

Preview with #1C66BC

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

Preview Lab → · Contrast checker → · Palette generator →