#12397B#12397B

#12397B is a dark, vivid blue. Relative luminance 0.045; OKLCH L 36.0% C 0.121 H 260.4°. Best body text is #FFFFFF at 11.07:1 contrast (WCAG AA passes).

Color values

HEX	#12397B
RGB	rgb(18, 57, 123)
HSL	hsl(218, 74%, 28%)
HSV	hsv(218, 85%, 48%)
CMYK	cmyk(85.4%, 53.7%, 0%, 51.8%)
CIE-LAB	lab(25.21, 13.22, -41.33)
CIE-LCH	lch(25.21, 43.40, 287.74°)
OKLab	oklab(35.97% -0.0202 -0.1191)
OKLCH	oklch(35.97% 0.121 260.4)
XYZ	xyz(5.2864, 4.4843, 19.3220)
Luminance	0.0449 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#12397B #7B5412

analogous

#126E7B #12397B #1F127B

triadic

#12397B #7B1239 #397B12

tetradic

#12397B #7B126E #7B5412 #127B1F

square

#12397B #7B126E #7B5412 #127B1F

split-complementary

#12397B #7B1F12 #6E7B12

monochromatic

#040C1B #0A2046 #12397B #1A52B0 #286CE0

Accessibility & contrast

On white

11.07

#12397B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#12397B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #12397B

11.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##12397B	#FFFFFF	#000000	##FFFFFF
##12397B	1.00	11.07	1.90	11.07
#FFFFFF	11.07	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0B417D

Deuteranopia (green-blind)

#00377A

Tritanopia (blue-blind)

#004954

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #12397b;
/* rgb */ color: rgb(18, 57, 123);
/* oklch */ color: oklch(36.0% 0.121 260.4);

Tailwind

colors: {
  custom: {
    50: '#646ea2',
    500: '#12397b',
    950: '#000000',
  },
}

SCSS

$custom: #12397b;
$custom-light: #646ea2;
$custom-dark: #000000;

JSON

{
  "hex": "#12397b",
  "rgb": {
    "r": 18,
    "g": 57,
    "b": 123
  },
  "hsl": {
    "h": 217.714,
    "s": 74.468,
    "l": 27.647
  },
  "oklch": {
    "l": 0.35966,
    "c": 0.12083,
    "h": 260.4
  },
  "luminance": 0.04485
}

Semantic roles & 50–950 ramp

primary

#12397B

secondary

#B18438

accent

#AC37F1

background

#F6F6FA

surface

#EBEBF3

border

#C6C6CD

text

#06070F

muted

#7A7A7F

Preview Lab

Preview with #12397B

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

Preview Lab → · Contrast checker → · Palette generator →