#4275DD#4275DD

#4275DD is a mid, vivid blue. Relative luminance 0.191; OKLCH L 58.2% C 0.168 H 262.7°. Best body text is #000000 at 4.82:1 contrast (WCAG AA passes).

Color values

HEX	#4275DD
RGB	rgb(66, 117, 221)
HSL	hsl(220, 70%, 56%)
HSV	hsv(220, 70%, 87%)
CMYK	cmyk(70.1%, 47.1%, 0%, 13.3%)
CIE-LAB	lab(50.80, 17.44, -58.20)
CIE-LCH	lch(50.80, 60.76, 286.68°)
OKLab	oklab(58.18% -0.0214 -0.1669)
OKLCH	oklch(58.18% 0.168 262.7)
XYZ	xyz(21.6546, 19.0990, 70.9378)
Luminance	0.1910 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4275DD #DDAA42

analogous

#42C3DD #4275DD #5D42DD

triadic

#4275DD #DD4275 #75DD42

tetradic

#4275DD #DD42C3 #DDAA42 #42DD5D

square

#4275DD #DD42C3 #DDAA42 #42DD5D

split-complementary

#4275DD #DD5D42 #C3DD42

monochromatic

#193F8C #2256BF #4275DD #769BE6 #AAC1F0

Accessibility & contrast

On white

4.36

#4275DD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.82

#4275DD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4275DD

4.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4275DD	#FFFFFF	#000000	##000000
##4275DD	1.00	4.36	4.82	4.82
#FFFFFF	4.36	1.00	21.00	21.00
#000000	4.82	21.00	1.00	1.00
##000000	4.82	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3D81E1

Deuteranopia (green-blind)

#1672DB

Tritanopia (blue-blind)

#008D9E

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #4275dd;
/* rgb */ color: rgb(66, 117, 221);
/* oklch */ color: oklch(58.2% 0.168 262.7);

Tailwind

colors: {
  custom: {
    50: '#889ce8',
    500: '#4275dd',
    950: '#000000',
  },
}

SCSS

$custom: #4275dd;
$custom-light: #889ce8;
$custom-dark: #000000;

JSON

{
  "hex": "#4275dd",
  "rgb": {
    "r": 66,
    "g": 117,
    "b": 221
  },
  "hsl": {
    "h": 220.258,
    "s": 69.507,
    "l": 56.275
  },
  "oklch": {
    "l": 0.58175,
    "c": 0.16825,
    "h": 262.7
  },
  "luminance": 0.19101
}

Semantic roles & 50–950 ramp

primary

#4275DD

secondary

#DDC89D

accent

#B23BEC

background

#F9F9FE

surface

#F1F2FD

border

#CBCCD5

text

#0D0E16

muted

#7E7E84

Preview Lab

Preview with #4275DD

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

Preview Lab → · Contrast checker → · Palette generator →