#21397B#21397B

#21397B is a dark, moderate blue. Relative luminance 0.047; OKLCH L 36.6% C 0.116 H 265.8°. Best body text is #FFFFFF at 10.85:1 contrast (WCAG AA passes).

Color values

HEX	#21397B
RGB	rgb(33, 57, 123)
HSL	hsl(224, 58%, 31%)
HSV	hsv(224, 73%, 48%)
CMYK	cmyk(73.2%, 53.7%, 0%, 51.8%)
CIE-LAB	lab(25.80, 15.13, -40.35)
CIE-LCH	lch(25.80, 43.10, 290.55°)
OKLab	oklab(36.58% -0.0085 -0.116)
OKLCH	oklch(36.58% 0.116 265.8)
XYZ	xyz(5.6642, 4.6791, 19.3397)
Luminance	0.0468 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#21397B #7B6321

analogous

#21667B #21397B #36217B

triadic

#21397B #7B2139 #397B21

tetradic

#21397B #7B2166 #7B6321 #217B36

square

#21397B #7B2166 #7B6321 #217B36

split-complementary

#21397B #7B3621 #667B21

monochromatic

#070C1A #14234B #21397B #2E4FAB #486CCE

Accessibility & contrast

On white

10.85

#21397B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.94

#21397B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #21397B

10.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##21397B	#FFFFFF	#000000	##FFFFFF
##21397B	1.00	10.85	1.94	10.85
#FFFFFF	10.85	1.00	21.00	1.00
#000000	1.94	21.00	1.00	21.00
##FFFFFF	10.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0F417D

Deuteranopia (green-blind)

#00397A

Tritanopia (blue-blind)

#004954

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #21397b;
/* rgb */ color: rgb(33, 57, 123);
/* oklch */ color: oklch(36.6% 0.116 265.8);

Tailwind

colors: {
  custom: {
    50: '#696ea2',
    500: '#21397b',
    950: '#000000',
  },
}

SCSS

$custom: #21397b;
$custom-light: #696ea2;
$custom-dark: #000000;

JSON

{
  "hex": "#21397b",
  "rgb": {
    "r": 33,
    "g": 57,
    "b": 123
  },
  "hsl": {
    "h": 224,
    "s": 57.692,
    "l": 30.588
  },
  "oklch": {
    "l": 0.36577,
    "c": 0.11629,
    "h": 265.8
  },
  "luminance": 0.0468
}

Semantic roles & 50–950 ramp

primary

#21397B

secondary

#AE934A

accent

#B847E1

background

#F6F6FA

surface

#EBEBF3

border

#C6C6CD

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #21397B

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

Preview Lab → · Contrast checker → · Palette generator →