#4571B8#4571B8

#4571B8 is a mid, vivid blue. Relative luminance 0.165; OKLCH L 55.1% C 0.121 H 259.5°. Best body text is #FFFFFF at 4.88:1 contrast (WCAG AA passes).

Color values

HEX	#4571B8
RGB	rgb(69, 113, 184)
HSL	hsl(217, 45%, 50%)
HSV	hsv(217, 63%, 72%)
CMYK	cmyk(62.5%, 38.6%, 0%, 27.8%)
CIE-LAB	lab(47.67, 7.33, -42.05)
CIE-LCH	lch(47.67, 42.69, 279.88°)
OKLab	oklab(55.1% -0.022 -0.1195)
OKLCH	oklch(55.1% 0.121 259.5)
XYZ	xyz(17.0080, 16.5346, 47.6333)
Luminance	0.1654 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4571B8 #B88C45

analogous

#45ABB8 #4571B8 #5245B8

triadic

#4571B8 #B84571 #71B845

tetradic

#4571B8 #B845AB #B88C45 #45B852

square

#4571B8 #B845AB #B88C45 #45B852

split-complementary

#4571B8 #B85245 #ABB845

monochromatic

#243A5F #34568B #4571B8 #7193CA #9DB5DA

Accessibility & contrast

On white

4.88

#4571B8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.31

#4571B8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4571B8

4.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4571B8	#FFFFFF	#000000	##FFFFFF
##4571B8	1.00	4.88	4.31	4.88
#FFFFFF	4.88	1.00	21.00	1.00
#000000	4.31	21.00	1.00	21.00
##FFFFFF	4.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5277BB

Deuteranopia (green-blind)

#426CB7

Tritanopia (blue-blind)

#00818B

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #4571b8;
/* rgb */ color: rgb(69, 113, 184);
/* oklch */ color: oklch(55.1% 0.121 259.5);

Tailwind

colors: {
  custom: {
    50: '#8399ce',
    500: '#4571b8',
    950: '#000000',
  },
}

SCSS

$custom: #4571b8;
$custom-light: #8399ce;
$custom-dark: #000000;

JSON

{
  "hex": "#4571b8",
  "rgb": {
    "r": 69,
    "g": 113,
    "b": 184
  },
  "hsl": {
    "h": 217.043,
    "s": 45.455,
    "l": 49.608
  },
  "oklch": {
    "l": 0.55098,
    "c": 0.12148,
    "h": 259.5
  },
  "luminance": 0.16536
}

Semantic roles & 50–950 ramp

primary

#4571B8

secondary

#C7B392

accent

#A353D5

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0C0D13

muted

#7D7E82

Preview Lab

Preview with #4571B8

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

Preview Lab → · Contrast checker → · Palette generator →