#1F66A6#1F66A6

#1F66A6 is a mid, vivid cyan. Relative luminance 0.125; OKLCH L 50.0% C 0.123 H 250.1°. Best body text is #FFFFFF at 5.98:1 contrast (WCAG AA passes).

Color values

HEX	#1F66A6
RGB	rgb(31, 102, 166)
HSL	hsl(208, 69%, 39%)
HSV	hsv(208, 81%, 65%)
CMYK	cmyk(81.3%, 38.6%, 0%, 34.9%)
CIE-LAB	lab(42.07, 1.89, -40.50)
CIE-LCH	lch(42.07, 40.55, 272.68°)
OKLab	oklab(50.03% -0.0419 -0.1156)
OKLCH	oklch(50.03% 0.123 250.1)
XYZ	xyz(12.1968, 12.5457, 37.8477)
Luminance	0.1255 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F66A6 #A65F1F

analogous

#1FA6A2 #1F66A6 #1F23A6

triadic

#1F66A6 #A61F66 #66A61F

tetradic

#1F66A6 #A21FA6 #A65F1F #23A61F

square

#1F66A6 #A21FA6 #A65F1F #23A61F

split-complementary

#1F66A6 #A61F23 #A6A21F

monochromatic

#0C273F #154672 #1F66A6 #2B86D7 #5EA3E1

Accessibility & contrast

On white

5.98

#1F66A6 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.51

#1F66A6 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1F66A6

5.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F66A6	#FFFFFF	#000000	##FFFFFF
##1F66A6	1.00	5.98	3.51	5.98
#FFFFFF	5.98	1.00	21.00	1.00
#000000	3.51	21.00	1.00	21.00
##FFFFFF	5.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#476AA9

Deuteranopia (green-blind)

#325EA5

Tritanopia (blue-blind)

#00757E

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #1f66a6;
/* rgb */ color: rgb(31, 102, 166);
/* oklch */ color: oklch(50.0% 0.123 250.1);

Tailwind

colors: {
  custom: {
    50: '#7191c1',
    500: '#1f66a6',
    950: '#000000',
  },
}

SCSS

$custom: #1f66a6;
$custom-light: #7191c1;
$custom-dark: #000000;

JSON

{
  "hex": "#1f66a6",
  "rgb": {
    "r": 31,
    "g": 102,
    "b": 166
  },
  "hsl": {
    "h": 208.444,
    "s": 68.528,
    "l": 38.627
  },
  "oklch": {
    "l": 0.5003,
    "c": 0.12297,
    "h": 250.1
  },
  "luminance": 0.12547
}

Semantic roles & 50–950 ramp

primary

#1F66A6

secondary

#C58E5B

accent

#8F3CEB

background

#F7F8FB

surface

#EDF0F7

border

#C8CBD0

text

#090C12

muted

#7B7D81

Preview Lab

Preview with #1F66A6

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

Preview Lab → · Contrast checker → · Palette generator →