#4290DD#4290DD

#4290DD is a light, vivid cyan. Relative luminance 0.263; OKLCH L 64.0% C 0.139 H 250.7°. Best body text is #000000 at 6.26:1 contrast (WCAG AA passes).

Color values

HEX	#4290DD
RGB	rgb(66, 144, 221)
HSL	hsl(210, 70%, 56%)
HSV	hsv(210, 70%, 87%)
CMYK	cmyk(70.1%, 34.8%, 0%, 13.3%)
CIE-LAB	lab(58.34, 1.05, -46.18)
CIE-LCH	lch(58.34, 46.19, 271.31°)
OKLab	oklab(64.02% -0.046 -0.1312)
OKLCH	oklch(64.02% 0.139 250.7)
XYZ	xyz(25.2663, 26.3225, 72.1418)
Luminance	0.2632 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4290DD #DD8F42

analogous

#42DDDC #4290DD #4243DD

triadic

#4290DD #DD4290 #90DD42

tetradic

#4290DD #DC42DD #DD8F42 #43DD42

square

#4290DD #DC42DD #DD8F42 #43DD42

split-complementary

#4290DD #DD4243 #DDDC42

monochromatic

#19538C #2271BF #4290DD #76AEE6 #AACDF0

Accessibility & contrast

On white

3.35

#4290DD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.26

#4290DD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4290DD

6.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4290DD	#FFFFFF	#000000	##000000
##4290DD	1.00	3.35	6.26	6.26
#FFFFFF	3.35	1.00	21.00	21.00
#000000	6.26	21.00	1.00	1.00
##000000	6.26	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6D94E0

Deuteranopia (green-blind)

#5786DB

Tritanopia (blue-blind)

#00A2AC

Achromatopsia (no color)

#8C8C8C

Design tokens & code

CSS

--color: #4290dd;
/* rgb */ color: rgb(66, 144, 221);
/* oklch */ color: oklch(64.0% 0.139 250.7);

Tailwind

colors: {
  custom: {
    50: '#88b0e8',
    500: '#4290dd',
    950: '#000000',
  },
}

SCSS

$custom: #4290dd;
$custom-light: #88b0e8;
$custom-dark: #000000;

JSON

{
  "hex": "#4290dd",
  "rgb": {
    "r": 66,
    "g": 144,
    "b": 221
  },
  "hsl": {
    "h": 209.806,
    "s": 69.507,
    "l": 56.275
  },
  "oklch": {
    "l": 0.64023,
    "c": 0.13902,
    "h": 250.7
  },
  "luminance": 0.26325
}

Semantic roles & 50–950 ramp

primary

#4290DD

secondary

#DDBD9D

accent

#933BEC

background

#F9FAFE

surface

#F1F4FC

border

#CBCED5

text

#0D1016

muted

#7E7F84

Preview Lab

Preview with #4290DD

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

Preview Lab → · Contrast checker → · Palette generator →