#427BB1#427BB1

#427BB1 is a mid, moderate cyan. Relative luminance 0.185; OKLCH L 56.8% C 0.103 H 248.9°. Best body text is #000000 at 4.70:1 contrast (WCAG AA passes).

Color values

HEX	#427BB1
RGB	rgb(66, 123, 177)
HSL	hsl(209, 46%, 48%)
HSV	hsv(209, 63%, 69%)
CMYK	cmyk(62.7%, 30.5%, 0%, 30.6%)
CIE-LAB	lab(50.09, -1.73, -34.19)
CIE-LCH	lch(50.09, 34.23, 267.11°)
OKLab	oklab(56.84% -0.0371 -0.0964)
OKLCH	oklch(56.84% 0.103 248.9)
XYZ	xyz(17.2626, 18.4968, 44.2470)
Luminance	0.1850 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#427BB1 #B17842

analogous

#42B1AF #427BB1 #4244B1

triadic

#427BB1 #B1427B #7BB142

tetradic

#427BB1 #AF42B1 #B17842 #44B142

square

#427BB1 #AF42B1 #B17842 #44B142

split-complementary

#427BB1 #B14244 #B1AF42

monochromatic

#213D58 #315C84 #427BB1 #6999C7 #96B8D8

Accessibility & contrast

On white

4.47

#427BB1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.70

#427BB1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #427BB1

4.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##427BB1	#FFFFFF	#000000	##000000
##427BB1	1.00	4.47	4.70	4.70
#FFFFFF	4.47	1.00	21.00	21.00
#000000	4.70	21.00	1.00	1.00
##000000	4.70	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#647DB3

Deuteranopia (green-blind)

#5572B0

Tritanopia (blue-blind)

#00888E

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #427bb1;
/* rgb */ color: rgb(66, 123, 177);
/* oklch */ color: oklch(56.8% 0.103 248.9);

Tailwind

colors: {
  custom: {
    50: '#81a0c8',
    500: '#427bb1',
    950: '#000000',
  },
}

SCSS

$custom: #427bb1;
$custom-light: #81a0c8;
$custom-dark: #000000;

JSON

{
  "hex": "#427bb1",
  "rgb": {
    "r": 66,
    "g": 123,
    "b": 177
  },
  "hsl": {
    "h": 209.189,
    "s": 45.679,
    "l": 47.647
  },
  "oklch": {
    "l": 0.56841,
    "c": 0.10336,
    "h": 248.9
  },
  "luminance": 0.18498
}

Semantic roles & 50–950 ramp

primary

#427BB1

secondary

#C3A78B

accent

#9252D5

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #427BB1

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

Preview Lab → · Contrast checker → · Palette generator →