#4281E0#4281E0

#4281E0 is a mid, vivid blue. Relative luminance 0.222; OKLCH L 60.9% C 0.158 H 258.5°. Best body text is #000000 at 5.45:1 contrast (WCAG AA passes).

Color values

HEX	#4281E0
RGB	rgb(66, 129, 224)
HSL	hsl(216, 72%, 57%)
HSV	hsv(216, 71%, 88%)
CMYK	cmyk(70.5%, 42.4%, 0%, 12.2%)
CIE-LAB	lab(54.28, 11.10, -54.32)
CIE-LCH	lch(54.28, 55.44, 281.55°)
OKLab	oklab(60.91% -0.0315 -0.1553)
OKLCH	oklch(60.91% 0.158 258.5)
XYZ	xyz(23.5467, 22.2381, 73.5580)
Luminance	0.2224 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4281E0 #E0A142

analogous

#42D0E0 #4281E0 #5242E0

triadic

#4281E0 #E04281 #81E042

tetradic

#4281E0 #E042D0 #E0A142 #42E052

square

#4281E0 #E042D0 #E0A142 #42E052

split-complementary

#4281E0 #E05242 #D0E042

monochromatic

#184890 #2062C5 #4281E0 #77A4E9 #ABC7F1

Accessibility & contrast

On white

3.85

#4281E0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.45

#4281E0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4281E0

5.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4281E0	#FFFFFF	#000000	##000000
##4281E0	1.00	3.85	5.45	5.45
#FFFFFF	3.85	1.00	21.00	21.00
#000000	5.45	21.00	1.00	1.00
##000000	5.45	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#538AE4

Deuteranopia (green-blind)

#387BDE

Tritanopia (blue-blind)

#0097A5

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #4281e0;
/* rgb */ color: rgb(66, 129, 224);
/* oklch */ color: oklch(60.9% 0.158 258.5);

Tailwind

colors: {
  custom: {
    50: '#88a5ea',
    500: '#4281e0',
    950: '#000000',
  },
}

SCSS

$custom: #4281e0;
$custom-light: #88a5ea;
$custom-dark: #000000;

JSON

{
  "hex": "#4281e0",
  "rgb": {
    "r": 66,
    "g": 129,
    "b": 224
  },
  "hsl": {
    "h": 216.076,
    "s": 71.818,
    "l": 56.863
  },
  "oklch": {
    "l": 0.60909,
    "c": 0.15843,
    "h": 258.5
  },
  "luminance": 0.22241
}

Semantic roles & 50–950 ramp

primary

#4281E0

secondary

#DFC59F

accent

#A639EF

background

#F9FAFE

surface

#F1F4FD

border

#CBCED5

text

#0D0F16

muted

#7E7F84

Preview Lab

Preview with #4281E0

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

Preview Lab → · Contrast checker → · Palette generator →