#3121B3#3121B3

#3121B3 is a dark, highly saturated blue. Relative luminance 0.050; OKLCH L 39.1% C 0.212 H 275.2°. Best body text is #FFFFFF at 10.51:1 contrast (WCAG AA passes).

Color values

HEX	#3121B3
RGB	rgb(49, 33, 179)
HSL	hsl(247, 69%, 42%)
HSV	hsv(247, 82%, 70%)
CMYK	cmyk(72.6%, 81.6%, 0%, 29.8%)
CIE-LAB	lab(26.72, 51.47, -73.17)
CIE-LCH	lch(26.72, 89.46, 305.12°)
OKLab	oklab(39.11% 0.0191 -0.2116)
OKLCH	oklch(39.11% 0.212 275.2)
XYZ	xyz(9.9445, 4.9944, 43.0790)
Luminance	0.0500 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3121B3 #A3B321

analogous

#215AB3 #3121B3 #7A21B3

triadic

#3121B3 #B33121 #21B331

tetradic

#3121B3 #B3215A #A3B321 #21B37A

square

#3121B3 #B3215A #A3B321 #21B37A

split-complementary

#3121B3 #B37A21 #5AB321

monochromatic

#150E4C #23177F #3121B3 #4937DA #786BE4

Accessibility & contrast

On white

10.51

#3121B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.00

#3121B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3121B3

10.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3121B3	#FFFFFF	#000000	##FFFFFF
##3121B3	1.00	10.51	2.00	10.51
#FFFFFF	10.51	1.00	21.00	1.00
#000000	2.00	21.00	1.00	21.00
##FFFFFF	10.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0045B7

Deuteranopia (green-blind)

#0038B1

Tritanopia (blue-blind)

#004F6B

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #3121b3;
/* rgb */ color: rgb(49, 33, 179);
/* oklch */ color: oklch(39.1% 0.212 275.2);

Tailwind

colors: {
  custom: {
    50: '#7e61cb',
    500: '#3121b3',
    950: '#000000',
  },
}

SCSS

$custom: #3121b3;
$custom-light: #7e61cb;
$custom-dark: #000000;

JSON

{
  "hex": "#3121b3",
  "rgb": {
    "r": 49,
    "g": 33,
    "b": 179
  },
  "hsl": {
    "h": 246.575,
    "s": 68.868,
    "l": 41.569
  },
  "oklch": {
    "l": 0.39114,
    "c": 0.21242,
    "h": 275.2
  },
  "luminance": 0.04995
}

Semantic roles & 50–950 ramp

primary

#3121B3

secondary

#BFCA66

accent

#EC3CD8

background

#F8F5FC

surface

#F0EAF9

border

#CBC6D2

text

#0C0513

muted

#7D7982

Preview Lab

Preview with #3121B3

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

Preview Lab → · Contrast checker → · Palette generator →