#4271DA#4271DA

#4271DA is a mid, vivid blue. Relative luminance 0.180; OKLCH L 57.1% C 0.169 H 263.8°. Best body text is #000000 at 4.61:1 contrast (WCAG AA passes).

Color values

HEX	#4271DA
RGB	rgb(66, 113, 218)
HSL	hsl(221, 67%, 56%)
HSV	hsv(221, 70%, 85%)
CMYK	cmyk(69.7%, 48.2%, 0%, 14.5%)
CIE-LAB	lab(49.53, 18.86, -58.55)
CIE-LCH	lch(49.53, 61.52, 287.85°)
OKLab	oklab(57.14% -0.0184 -0.168)
OKLCH	oklch(57.14% 0.169 263.8)
XYZ	xyz(20.8023, 18.0283, 68.6996)
Luminance	0.1803 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4271DA #DAAB42

analogous

#42BDDA #4271DA #5F42DA

triadic

#4271DA #DA4271 #71DA42

tetradic

#4271DA #DA42BD #DAAB42 #42DA5F

square

#4271DA #DA42BD #DAAB42 #42DA5F

split-complementary

#4271DA #DA5F42 #BDDA42

monochromatic

#1A3C87 #2453BA #4271DA #7597E4 #A8BEEE

Accessibility & contrast

On white

4.56

#4271DA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.61

#4271DA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4271DA

4.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4271DA	#FFFFFF	#000000	##000000
##4271DA	1.00	4.56	4.61	4.61
#FFFFFF	4.56	1.00	21.00	21.00
#000000	4.61	21.00	1.00	1.00
##000000	4.61	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#377DDE

Deuteranopia (green-blind)

#086FD8

Tritanopia (blue-blind)

#008A9B

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #4271da;
/* rgb */ color: rgb(66, 113, 218);
/* oklch */ color: oklch(57.1% 0.169 263.8);

Tailwind

colors: {
  custom: {
    50: '#8899e6',
    500: '#4271da',
    950: '#000000',
  },
}

SCSS

$custom: #4271da;
$custom-light: #8899e6;
$custom-dark: #000000;

JSON

{
  "hex": "#4271da",
  "rgb": {
    "r": 66,
    "g": 113,
    "b": 218
  },
  "hsl": {
    "h": 221.447,
    "s": 67.257,
    "l": 55.686
  },
  "oklch": {
    "l": 0.5714,
    "c": 0.16898,
    "h": 263.8
  },
  "luminance": 0.1803
}

Semantic roles & 50–950 ramp

primary

#4271DA

secondary

#DBC89C

accent

#B53EEA

background

#F9F9FE

surface

#F1F2FC

border

#CBCCD5

text

#0D0D16

muted

#7E7E84

Preview Lab

Preview with #4271DA

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

Preview Lab → · Contrast checker → · Palette generator →