#3121BB#3121BB

#3121BB is a dark, highly saturated blue. Relative luminance 0.053; OKLCH L 40.0% C 0.222 H 274.4°. Best body text is #FFFFFF at 10.17:1 contrast (WCAG AA passes).

Color values

HEX	#3121BB
RGB	rgb(49, 33, 187)
HSL	hsl(246, 70%, 43%)
HSV	hsv(246, 82%, 73%)
CMYK	cmyk(73.8%, 82.4%, 0%, 26.7%)
CIE-LAB	lab(27.65, 53.87, -76.39)
CIE-LCH	lch(27.65, 93.47, 305.19°)
OKLab	oklab(40.03% 0.0169 -0.2209)
OKLCH	oklch(40.03% 0.222 274.4)
XYZ	xyz(10.7772, 5.3274, 47.4644)
Luminance	0.0533 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3121BB #ABBB21

analogous

#215EBB #3121BB #7E21BB

triadic

#3121BB #BB3121 #21BB31

tetradic

#3121BB #BB215E #ABBB21 #21BB7E

square

#3121BB #BB215E #ABBB21 #21BB7E

split-complementary

#3121BB #BB7E21 #5EBB21

monochromatic

#160F53 #231887 #3121BB #4D3DDD #7D71E6

Accessibility & contrast

On white

10.17

#3121BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.07

#3121BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3121BB

10.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3121BB	#FFFFFF	#000000	##FFFFFF
##3121BB	1.00	10.17	2.07	10.17
#FFFFFF	10.17	1.00	21.00	1.00
#000000	2.07	21.00	1.00	21.00
##FFFFFF	10.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0048BF

Deuteranopia (green-blind)

#003AB8

Tritanopia (blue-blind)

#005270

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #3121bb;
/* rgb */ color: rgb(49, 33, 187);
/* oklch */ color: oklch(40.0% 0.222 274.4);

Tailwind

colors: {
  custom: {
    50: '#8062d1',
    500: '#3121bb',
    950: '#000000',
  },
}

SCSS

$custom: #3121bb;
$custom-light: #8062d1;
$custom-dark: #000000;

JSON

{
  "hex": "#3121bb",
  "rgb": {
    "r": 49,
    "g": 33,
    "b": 187
  },
  "hsl": {
    "h": 246.234,
    "s": 70,
    "l": 43.137
  },
  "oklch": {
    "l": 0.40026,
    "c": 0.22155,
    "h": 274.4
  },
  "luminance": 0.05329
}

Semantic roles & 50–950 ramp

primary

#3121BB

secondary

#C2CC6B

accent

#ED3BDA

background

#F8F6FD

surface

#F0EBFA

border

#CBC6D3

text

#0C0514

muted

#7D7A83

Preview Lab

Preview with #3121BB

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

Preview Lab → · Contrast checker → · Palette generator →