#12387B#12387B

#12387B is a dark, vivid blue. Relative luminance 0.044; OKLCH L 35.7% C 0.122 H 260.8°. Best body text is #FFFFFF at 11.19:1 contrast (WCAG AA passes).

Color values

HEX	#12387B
RGB	rgb(18, 56, 123)
HSL	hsl(218, 74%, 28%)
HSV	hsv(218, 85%, 48%)
CMYK	cmyk(85.4%, 54.5%, 0%, 51.8%)
CIE-LAB	lab(24.91, 13.93, -41.82)
CIE-LCH	lch(24.91, 44.08, 288.42°)
OKLab	oklab(35.74% -0.0194 -0.1206)
OKLCH	oklch(35.74% 0.122 260.8)
XYZ	xyz(5.2375, 4.3864, 19.3057)
Luminance	0.0439 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#12387B #7B5512

analogous

#126C7B #12387B #21127B

triadic

#12387B #7B1238 #387B12

tetradic

#12387B #7B126C #7B5512 #127B21

square

#12387B #7B126C #7B5512 #127B21

split-complementary

#12387B #7B2112 #6C7B12

monochromatic

#040C1B #0A2046 #12387B #1A50B0 #286AE0

Accessibility & contrast

On white

11.19

#12387B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#12387B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #12387B

11.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##12387B	#FFFFFF	#000000	##FFFFFF
##12387B	1.00	11.19	1.88	11.19
#FFFFFF	11.19	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#06407D

Deuteranopia (green-blind)

#00377A

Tritanopia (blue-blind)

#004853

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #12387b;
/* rgb */ color: rgb(18, 56, 123);
/* oklch */ color: oklch(35.7% 0.122 260.8);

Tailwind

colors: {
  custom: {
    50: '#646ea2',
    500: '#12387b',
    950: '#000000',
  },
}

SCSS

$custom: #12387b;
$custom-light: #646ea2;
$custom-dark: #000000;

JSON

{
  "hex": "#12387b",
  "rgb": {
    "r": 18,
    "g": 56,
    "b": 123
  },
  "hsl": {
    "h": 218.286,
    "s": 74.468,
    "l": 27.647
  },
  "oklch": {
    "l": 0.35735,
    "c": 0.12215,
    "h": 260.8
  },
  "luminance": 0.04387
}

Semantic roles & 50–950 ramp

primary

#12387B

secondary

#B18538

accent

#AE37F1

background

#F6F6FA

surface

#EBEBF3

border

#C6C6CD

text

#06070F

muted

#7A7A7F

Preview Lab

Preview with #12387B

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

Preview Lab → · Contrast checker → · Palette generator →