#4278BB#4278BB

#4278BB is a mid, moderate cyan. Relative luminance 0.182; OKLCH L 56.7% C 0.119 H 254.9°. Best body text is #000000 at 4.64:1 contrast (WCAG AA passes).

Color values

HEX	#4278BB
RGB	rgb(66, 120, 187)
HSL	hsl(213, 48%, 50%)
HSV	hsv(213, 65%, 73%)
CMYK	cmyk(64.7%, 35.8%, 0%, 26.7%)
CIE-LAB	lab(49.71, 3.52, -40.56)
CIE-LCH	lch(49.71, 40.71, 274.96°)
OKLab	oklab(56.7% -0.0311 -0.1151)
OKLCH	oklch(56.7% 0.119 254.9)
XYZ	xyz(17.9296, 18.1773, 49.5678)
Luminance	0.1818 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4278BB #BB8542

analogous

#42B5BB #4278BB #4942BB

triadic

#4278BB #BB4278 #78BB42

tetradic

#4278BB #BB42B5 #BB8542 #42BB49

square

#4278BB #BB42B5 #BB8542 #42BB49

split-complementary

#4278BB #BB4942 #B5BB42

monochromatic

#223E61 #325B8E #4278BB #6E98CC #9CB8DC

Accessibility & contrast

On white

4.53

#4278BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.64

#4278BB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4278BB

4.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4278BB	#FFFFFF	#000000	##000000
##4278BB	1.00	4.53	4.64	4.64
#FFFFFF	4.53	1.00	21.00	21.00
#000000	4.64	21.00	1.00	1.00
##000000	4.64	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B7CBE

Deuteranopia (green-blind)

#4A71BA

Tritanopia (blue-blind)

#008791

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #4278bb;
/* rgb */ color: rgb(66, 120, 187);
/* oklch */ color: oklch(56.7% 0.119 254.9);

Tailwind

colors: {
  custom: {
    50: '#829ed0',
    500: '#4278bb',
    950: '#000000',
  },
}

SCSS

$custom: #4278bb;
$custom-light: #829ed0;
$custom-dark: #000000;

JSON

{
  "hex": "#4278bb",
  "rgb": {
    "r": 66,
    "g": 120,
    "b": 187
  },
  "hsl": {
    "h": 213.223,
    "s": 47.826,
    "l": 49.608
  },
  "oklch": {
    "l": 0.56703,
    "c": 0.1192,
    "h": 254.9
  },
  "luminance": 0.18179
}

Semantic roles & 50–950 ramp

primary

#4278BB

secondary

#C8AF91

accent

#9B50D7

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #4278BB

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

Preview Lab → · Contrast checker → · Palette generator →