#4271B5#4271B5

#4271B5 is a mid, moderate blue. Relative luminance 0.163; OKLCH L 54.8% C 0.119 H 257.7°. Best body text is #FFFFFF at 4.93:1 contrast (WCAG AA passes).

Color values

HEX	#4271B5
RGB	rgb(66, 113, 181)
HSL	hsl(215, 47%, 48%)
HSV	hsv(215, 64%, 71%)
CMYK	cmyk(63.5%, 37.6%, 0%, 29%)
CIE-LAB	lab(47.37, 5.72, -40.80)
CIE-LCH	lch(47.37, 41.19, 277.98°)
OKLab	oklab(54.78% -0.0253 -0.1158)
OKLCH	oklch(54.78% 0.119 257.7)
XYZ	xyz(16.4894, 16.3032, 45.9849)
Luminance	0.1631 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4271B5 #B58642

analogous

#42AAB5 #4271B5 #4C42B5

triadic

#4271B5 #B54271 #71B542

tetradic

#4271B5 #B542AA #B58642 #42B54C

square

#4271B5 #B542AA #B58642 #42B54C

split-complementary

#4271B5 #B54C42 #AAB542

monochromatic

#21395B #325588 #4271B5 #6B92C9 #98B3D9

Accessibility & contrast

On white

4.93

#4271B5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.26

#4271B5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4271B5

4.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4271B5	#FFFFFF	#000000	##FFFFFF
##4271B5	1.00	4.93	4.26	4.93
#FFFFFF	4.93	1.00	21.00	1.00
#000000	4.26	21.00	1.00	21.00
##FFFFFF	4.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5376B8

Deuteranopia (green-blind)

#436BB4

Tritanopia (blue-blind)

#00808A

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #4271b5;
/* rgb */ color: rgb(66, 113, 181);
/* oklch */ color: oklch(54.8% 0.119 257.7);

Tailwind

colors: {
  custom: {
    50: '#8199cb',
    500: '#4271b5',
    950: '#000000',
  },
}

SCSS

$custom: #4271b5;
$custom-light: #8199cb;
$custom-dark: #000000;

JSON

{
  "hex": "#4271b5",
  "rgb": {
    "r": 66,
    "g": 113,
    "b": 181
  },
  "hsl": {
    "h": 215.478,
    "s": 46.559,
    "l": 48.431
  },
  "oklch": {
    "l": 0.54776,
    "c": 0.11856,
    "h": 257.7
  },
  "luminance": 0.16305
}

Semantic roles & 50–950 ramp

primary

#4271B5

secondary

#C5AE8E

accent

#A052D6

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0D13

muted

#7C7E82

Preview Lab

Preview with #4271B5

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

Preview Lab → · Contrast checker → · Palette generator →