#2817B3#2817B3

#2817B3 is a dark, highly saturated blue. Relative luminance 0.043; OKLCH L 37.6% C 0.222 H 272.6°. Best body text is #FFFFFF at 11.27:1 contrast (WCAG AA passes).

Color values

HEX	#2817B3
RGB	rgb(40, 23, 179)
HSL	hsl(247, 77%, 40%)
HSV	hsv(247, 87%, 70%)
CMYK	cmyk(77.7%, 87.2%, 0%, 29.8%)
CIE-LAB	lab(24.69, 55.12, -76.55)
CIE-LCH	lch(24.69, 94.33, 305.76°)
OKLab	oklab(37.57% 0.0099 -0.2213)
OKLCH	oklch(37.57% 0.222 272.6)
XYZ	xyz(9.3154, 4.3176, 42.9815)
Luminance	0.0432 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2817B3 #A2B317

analogous

#1754B3 #2817B3 #7617B3

triadic

#2817B3 #B32817 #17B328

tetradic

#2817B3 #B31754 #A2B317 #17B376

square

#2817B3 #B31754 #A2B317 #17B376

split-complementary

#2817B3 #B37617 #54B317

monochromatic

#100947 #1C107D #2817B3 #3924E3 #6A5BEA

Accessibility & contrast

On white

11.27

#2817B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#2817B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2817B3

11.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2817B3	#FFFFFF	#000000	##FFFFFF
##2817B3	1.00	11.27	1.86	11.27
#FFFFFF	11.27	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0042B7

Deuteranopia (green-blind)

#0033B0

Tritanopia (blue-blind)

#004C6A

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #2817b3;
/* rgb */ color: rgb(40, 23, 179);
/* oklch */ color: oklch(37.6% 0.222 272.6);

Tailwind

colors: {
  custom: {
    50: '#7c5ccb',
    500: '#2817b3',
    950: '#000000',
  },
}

SCSS

$custom: #2817b3;
$custom-light: #7c5ccb;
$custom-dark: #000000;

JSON

{
  "hex": "#2817b3",
  "rgb": {
    "r": 40,
    "g": 23,
    "b": 179
  },
  "hsl": {
    "h": 246.538,
    "s": 77.228,
    "l": 39.608
  },
  "oklch": {
    "l": 0.37565,
    "c": 0.22154,
    "h": 272.6
  },
  "luminance": 0.04319
}

Semantic roles & 50–950 ramp

primary

#2817B3

secondary

#C1CD58

accent

#F434DF

background

#F8F5FC

surface

#F0E9F9

border

#CBC5D2

text

#0C0414

muted

#7D7982

Preview Lab

Preview with #2817B3

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

Preview Lab → · Contrast checker → · Palette generator →