#4278D6#4278D6

#4278D6 is a mid, vivid blue. Relative luminance 0.194; OKLCH L 58.3% C 0.155 H 260.7°. Best body text is #000000 at 4.89:1 contrast (WCAG AA passes).

Color values

HEX	#4278D6
RGB	rgb(66, 120, 214)
HSL	hsl(218, 64%, 55%)
HSV	hsv(218, 69%, 84%)
CMYK	cmyk(69.2%, 43.9%, 0%, 16.1%)
CIE-LAB	lab(51.20, 13.07, -53.61)
CIE-LCH	lch(51.20, 55.17, 283.70°)
OKLab	oklab(58.35% -0.0252 -0.1533)
OKLCH	oklch(58.35% 0.155 260.7)
XYZ	xyz(21.0965, 19.4441, 66.2466)
Luminance	0.1945 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4278D6 #D6A042

analogous

#42C2D6 #4278D6 #5642D6

triadic

#4278D6 #D64278 #78D642

tetradic

#4278D6 #D642C2 #D6A042 #42D656

square

#4278D6 #D642C2 #D6A042 #42D656

split-complementary

#4278D6 #D65642 #C2D642

monochromatic

#1C4182 #275AB4 #4278D6 #749CE1 #A7C0EC

Accessibility & contrast

On white

4.30

#4278D6 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.89

#4278D6 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4278D6

4.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4278D6	#FFFFFF	#000000	##000000
##4278D6	1.00	4.30	4.89	4.89
#FFFFFF	4.30	1.00	21.00	21.00
#000000	4.89	21.00	1.00	1.00
##000000	4.89	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4A81DA

Deuteranopia (green-blind)

#2F74D4

Tritanopia (blue-blind)

#008E9C

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #4278d6;
/* rgb */ color: rgb(66, 120, 214);
/* oklch */ color: oklch(58.3% 0.155 260.7);

Tailwind

colors: {
  custom: {
    50: '#879ee3',
    500: '#4278d6',
    950: '#000000',
  },
}

SCSS

$custom: #4278d6;
$custom-light: #879ee3;
$custom-dark: #000000;

JSON

{
  "hex": "#4278d6",
  "rgb": {
    "r": 66,
    "g": 120,
    "b": 214
  },
  "hsl": {
    "h": 218.108,
    "s": 64.348,
    "l": 54.902
  },
  "oklch": {
    "l": 0.58346,
    "c": 0.15537,
    "h": 260.7
  },
  "luminance": 0.19446
}

Semantic roles & 50–950 ramp

primary

#4278D6

secondary

#D9C29B

accent

#AA40E7

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0D0E15

muted

#7D7E84

Preview Lab

Preview with #4278D6

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

Preview Lab → · Contrast checker → · Palette generator →