#4290D8#4290D8

#4290D8 is a light, vivid cyan. Relative luminance 0.261; OKLCH L 63.7% C 0.133 H 249.1°. Best body text is #000000 at 6.21:1 contrast (WCAG AA passes).

Color values

HEX	#4290D8
RGB	rgb(66, 144, 216)
HSL	hsl(209, 66%, 55%)
HSV	hsv(209, 69%, 85%)
CMYK	cmyk(69.4%, 33.3%, 0%, 15.3%)
CIE-LAB	lab(58.09, -0.69, -43.78)
CIE-LCH	lch(58.09, 43.78, 269.10°)
OKLab	oklab(63.75% -0.0474 -0.1242)
OKLCH	oklch(63.75% 0.133 249.1)
XYZ	xyz(24.6100, 26.0600, 68.6855)
Luminance	0.2606 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4290D8 #D88A42

analogous

#42D8D5 #4290D8 #4245D8

triadic

#4290D8 #D84290 #90D842

tetradic

#4290D8 #D542D8 #D88A42 #45D842

square

#4290D8 #D542D8 #D88A42 #45D842

split-complementary

#4290D8 #D84245 #D8D542

monochromatic

#1B5284 #2671B7 #4290D8 #75AEE2 #A7CCED

Accessibility & contrast

On white

3.38

#4290D8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.21

#4290D8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4290D8

6.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4290D8	#FFFFFF	#000000	##000000
##4290D8	1.00	3.38	6.21	6.21
#FFFFFF	3.38	1.00	21.00	21.00
#000000	6.21	21.00	1.00	1.00
##000000	6.21	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7093DB

Deuteranopia (green-blind)

#5B85D7

Tritanopia (blue-blind)

#00A1AA

Achromatopsia (no color)

#8C8C8C

Design tokens & code

CSS

--color: #4290d8;
/* rgb */ color: rgb(66, 144, 216);
/* oklch */ color: oklch(63.7% 0.133 249.1);

Tailwind

colors: {
  custom: {
    50: '#87b0e4',
    500: '#4290d8',
    950: '#000000',
  },
}

SCSS

$custom: #4290d8;
$custom-light: #87b0e4;
$custom-dark: #000000;

JSON

{
  "hex": "#4290d8",
  "rgb": {
    "r": 66,
    "g": 144,
    "b": 216
  },
  "hsl": {
    "h": 208.8,
    "s": 65.789,
    "l": 55.294
  },
  "oklch": {
    "l": 0.63747,
    "c": 0.1329,
    "h": 249.1
  },
  "luminance": 0.26063
}

Semantic roles & 50–950 ramp

primary

#4290D8

secondary

#DABA9C

accent

#913FE9

background

#F8FAFE

surface

#F0F4FC

border

#CBCED5

text

#0D1015

muted

#7D7F84

Preview Lab

Preview with #4290D8

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

Preview Lab → · Contrast checker → · Palette generator →