#4283DD#4283DD

#4283DD is a mid, vivid cyan. Relative luminance 0.226; OKLCH L 61.2% C 0.152 H 257.1°. Best body text is #000000 at 5.52:1 contrast (WCAG AA passes).

Color values

HEX	#4283DD
RGB	rgb(66, 131, 221)
HSL	hsl(215, 70%, 56%)
HSV	hsv(215, 70%, 87%)
CMYK	cmyk(70.1%, 40.7%, 0%, 13.3%)
CIE-LAB	lab(54.67, 8.82, -52.02)
CIE-LCH	lch(54.67, 52.76, 279.62°)
OKLab	oklab(61.16% -0.0339 -0.1485)
OKLCH	oklch(61.16% 0.152 257.1)
XYZ	xyz(23.4095, 22.6088, 71.5228)
Luminance	0.2261 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4283DD #DD9C42

analogous

#42D1DD #4283DD #4F42DD

triadic

#4283DD #DD4283 #83DD42

tetradic

#4283DD #DD42D1 #DD9C42 #42DD4F

square

#4283DD #DD42D1 #DD9C42 #42DD4F

split-complementary

#4283DD #DD4F42 #D1DD42

monochromatic

#19498C #2264BF #4283DD #76A5E6 #AAC7F0

Accessibility & contrast

On white

3.80

#4283DD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.52

#4283DD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4283DD

5.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4283DD	#FFFFFF	#000000	##000000
##4283DD	1.00	3.80	5.52	5.52
#FFFFFF	3.80	1.00	21.00	21.00
#000000	5.52	21.00	1.00	1.00
##000000	5.52	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#598BE1

Deuteranopia (green-blind)

#407CDB

Tritanopia (blue-blind)

#0098A5

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #4283dd;
/* rgb */ color: rgb(66, 131, 221);
/* oklch */ color: oklch(61.2% 0.152 257.1);

Tailwind

colors: {
  custom: {
    50: '#88a6e8',
    500: '#4283dd',
    950: '#000000',
  },
}

SCSS

$custom: #4283dd;
$custom-light: #88a6e8;
$custom-dark: #000000;

JSON

{
  "hex": "#4283dd",
  "rgb": {
    "r": 66,
    "g": 131,
    "b": 221
  },
  "hsl": {
    "h": 214.839,
    "s": 69.507,
    "l": 56.275
  },
  "oklch": {
    "l": 0.61156,
    "c": 0.1523,
    "h": 257.1
  },
  "luminance": 0.22611
}

Semantic roles & 50–950 ramp

primary

#4283DD

secondary

#DDC39D

accent

#A23BEC

background

#F9FAFE

surface

#F1F4FD

border

#CBCED5

text

#0D0F16

muted

#7E7F84

Preview Lab

Preview with #4283DD

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

Preview Lab → · Contrast checker → · Palette generator →