#4280DB#4280DB

#4280DB is a mid, vivid blue. Relative luminance 0.217; OKLCH L 60.4% C 0.153 H 258.1°. Best body text is #000000 at 5.34:1 contrast (WCAG AA passes).

Color values

HEX	#4280DB
RGB	rgb(66, 128, 219)
HSL	hsl(216, 68%, 56%)
HSV	hsv(216, 70%, 86%)
CMYK	cmyk(69.9%, 41.6%, 0%, 14.1%)
CIE-LAB	lab(53.72, 9.93, -52.41)
CIE-LCH	lch(53.72, 53.34, 280.73°)
OKLab	oklab(60.38% -0.0316 -0.1497)
OKLCH	oklch(60.38% 0.153 258.1)
XYZ	xyz(22.7475, 21.7087, 69.9955)
Luminance	0.2171 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4280DB #DB9D42

analogous

#42CDDB #4280DB #5042DB

triadic

#4280DB #DB4280 #80DB42

tetradic

#4280DB #DB42CD #DB9D42 #42DB50

square

#4280DB #DB42CD #DB9D42 #42DB50

split-complementary

#4280DB #DB5042 #CDDB42

monochromatic

#1A4789 #2461BC #4280DB #75A3E5 #A9C5EF

Accessibility & contrast

On white

3.93

#4280DB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.34

#4280DB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4280DB

5.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4280DB	#FFFFFF	#000000	##000000
##4280DB	1.00	3.93	5.34	5.34
#FFFFFF	3.93	1.00	21.00	21.00
#000000	5.34	21.00	1.00	1.00
##000000	5.34	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5588DF

Deuteranopia (green-blind)

#3B7AD9

Tritanopia (blue-blind)

#0095A3

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #4280db;
/* rgb */ color: rgb(66, 128, 219);
/* oklch */ color: oklch(60.4% 0.153 258.1);

Tailwind

colors: {
  custom: {
    50: '#88a4e7',
    500: '#4280db',
    950: '#000000',
  },
}

SCSS

$custom: #4280db;
$custom-light: #88a4e7;
$custom-dark: #000000;

JSON

{
  "hex": "#4280db",
  "rgb": {
    "r": 66,
    "g": 128,
    "b": 219
  },
  "hsl": {
    "h": 215.686,
    "s": 68,
    "l": 55.882
  },
  "oklch": {
    "l": 0.60382,
    "c": 0.15297,
    "h": 258.1
  },
  "luminance": 0.21711
}

Semantic roles & 50–950 ramp

primary

#4280DB

secondary

#DCC29D

accent

#A43DEB

background

#F9FAFE

surface

#F1F3FC

border

#CBCDD5

text

#0D0F16

muted

#7E7F84

Preview Lab

Preview with #4280DB

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

Preview Lab → · Contrast checker → · Palette generator →