#427BB5#427BB5

#427BB5 is a mid, moderate cyan. Relative luminance 0.187; OKLCH L 57.1% C 0.108 H 250.6°. Best body text is #000000 at 4.73:1 contrast (WCAG AA passes).

Color values

HEX	#427BB5
RGB	rgb(66, 123, 181)
HSL	hsl(210, 47%, 48%)
HSV	hsv(210, 64%, 71%)
CMYK	cmyk(63.5%, 32%, 0%, 29%)
CIE-LAB	lab(50.29, -0.36, -36.19)
CIE-LCH	lch(50.29, 36.20, 269.43°)
OKLab	oklab(57.06% -0.036 -0.1023)
OKLCH	oklch(57.06% 0.108 250.6)
XYZ	xyz(17.6672, 18.6587, 46.3775)
Luminance	0.1866 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#427BB5 #B57C42

analogous

#42B4B5 #427BB5 #4242B5

triadic

#427BB5 #B5427B #7BB542

tetradic

#427BB5 #B542B4 #B57C42 #42B542

square

#427BB5 #B542B4 #B57C42 #42B542

split-complementary

#427BB5 #B54242 #B4B542

monochromatic

#213E5B #325D88 #427BB5 #6B9AC9 #98B8D9

Accessibility & contrast

On white

4.44

#427BB5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.73

#427BB5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #427BB5

4.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##427BB5	#FFFFFF	#000000	##000000
##427BB5	1.00	4.44	4.73	4.73
#FFFFFF	4.44	1.00	21.00	21.00
#000000	4.73	21.00	1.00	1.00
##000000	4.73	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#627EB7

Deuteranopia (green-blind)

#5273B4

Tritanopia (blue-blind)

#008990

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #427bb5;
/* rgb */ color: rgb(66, 123, 181);
/* oklch */ color: oklch(57.1% 0.108 250.6);

Tailwind

colors: {
  custom: {
    50: '#81a0cb',
    500: '#427bb5',
    950: '#000000',
  },
}

SCSS

$custom: #427bb5;
$custom-light: #81a0cb;
$custom-dark: #000000;

JSON

{
  "hex": "#427bb5",
  "rgb": {
    "r": 66,
    "g": 123,
    "b": 181
  },
  "hsl": {
    "h": 210.261,
    "s": 46.559,
    "l": 48.431
  },
  "oklch": {
    "l": 0.57055,
    "c": 0.10843,
    "h": 250.6
  },
  "luminance": 0.1866
}

Semantic roles & 50–950 ramp

primary

#427BB5

secondary

#C5AA8E

accent

#9452D6

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #427BB5

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

Preview Lab → · Contrast checker → · Palette generator →