#4271BF#4271BF

#4271BF is a mid, vivid blue. Relative luminance 0.167; OKLCH L 55.4% C 0.132 H 260.0°. Best body text is #FFFFFF at 4.83:1 contrast (WCAG AA passes).

Color values

HEX	#4271BF
RGB	rgb(66, 113, 191)
HSL	hsl(217, 49%, 50%)
HSV	hsv(217, 65%, 75%)
CMYK	cmyk(65.4%, 40.8%, 0%, 25.1%)
CIE-LAB	lab(47.92, 9.23, -45.71)
CIE-LCH	lch(47.92, 46.64, 281.42°)
OKLab	oklab(55.38% -0.023 -0.1302)
OKLCH	oklch(55.38% 0.132 260)
XYZ	xyz(17.5525, 16.7284, 51.5840)
Luminance	0.1673 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4271BF #BF9042

analogous

#42AFBF #4271BF #5142BF

triadic

#4271BF #BF4271 #71BF42

tetradic

#4271BF #BF42AF #BF9042 #42BF51

square

#4271BF #BF42AF #BF9042 #42BF51

split-complementary

#4271BF #BF5142 #AFBF42

monochromatic

#223B65 #325692 #4271BF #7093CE #9DB6DE

Accessibility & contrast

On white

4.83

#4271BF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.35

#4271BF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4271BF

4.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4271BF	#FFFFFF	#000000	##FFFFFF
##4271BF	1.00	4.83	4.35	4.83
#FFFFFF	4.83	1.00	21.00	1.00
#000000	4.35	21.00	1.00	21.00
##FFFFFF	4.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4E78C2

Deuteranopia (green-blind)

#3B6CBD

Tritanopia (blue-blind)

#00838F

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #4271bf;
/* rgb */ color: rgb(66, 113, 191);
/* oklch */ color: oklch(55.4% 0.132 260.0);

Tailwind

colors: {
  custom: {
    50: '#8399d3',
    500: '#4271bf',
    950: '#000000',
  },
}

SCSS

$custom: #4271bf;
$custom-light: #8399d3;
$custom-dark: #000000;

JSON

{
  "hex": "#4271bf",
  "rgb": {
    "r": 66,
    "g": 113,
    "b": 191
  },
  "hsl": {
    "h": 217.44,
    "s": 49.407,
    "l": 50.392
  },
  "oklch": {
    "l": 0.55378,
    "c": 0.13225,
    "h": 260
  },
  "luminance": 0.1673
}

Semantic roles & 50–950 ramp

primary

#4271BF

secondary

#CAB593

accent

#A54FD9

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0C0D14

muted

#7D7E83

Preview Lab

Preview with #4271BF

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

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