#231B7C#231B7C

#231B7C is a dark, vivid blue. Relative luminance 0.026; OKLCH L 31.2% C 0.155 H 276.2°. Best body text is #FFFFFF at 13.82:1 contrast (WCAG AA passes).

Color values

HEX	#231B7C
RGB	rgb(35, 27, 124)
HSL	hsl(245, 64%, 30%)
HSV	hsv(245, 78%, 49%)
CMYK	cmyk(71.8%, 78.2%, 0%, 51.4%)
CIE-LAB	lab(18.35, 35.76, -53.16)
CIE-LCH	lch(18.35, 64.07, 303.93°)
OKLab	oklab(31.16% 0.0168 -0.1537)
OKLCH	oklch(31.16% 0.155 276.2)
XYZ	xyz(4.7220, 2.5960, 19.3171)
Luminance	0.0260 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231B7C #747C1B

analogous

#1B447C #231B7C #531B7C

triadic

#231B7C #7C231B #1B7C23

tetradic

#231B7C #7C1B44 #747C1B #1B7C53

square

#231B7C #7C1B44 #747C1B #1B7C53

split-complementary

#231B7C #7C531B #447C1B

monochromatic

#070519 #15104A #231B7C #3126AE #493DD5

Accessibility & contrast

On white

13.82

#231B7C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.52

#231B7C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231B7C

13.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231B7C	#FFFFFF	#000000	##FFFFFF
##231B7C	1.00	13.82	1.52	13.82
#FFFFFF	13.82	1.00	21.00	1.00
#000000	1.52	21.00	1.00	21.00
##FFFFFF	13.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00317F

Deuteranopia (green-blind)

#00287A

Tritanopia (blue-blind)

#00374A

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #231b7c;
/* rgb */ color: rgb(35, 27, 124);
/* oklch */ color: oklch(31.2% 0.155 276.2);

Tailwind

colors: {
  custom: {
    50: '#6d59a3',
    500: '#231b7c',
    950: '#000000',
  },
}

SCSS

$custom: #231b7c;
$custom-light: #6d59a3;
$custom-dark: #000000;

JSON

{
  "hex": "#231b7c",
  "rgb": {
    "r": 35,
    "g": 27,
    "b": 124
  },
  "hsl": {
    "h": 244.948,
    "s": 64.238,
    "l": 29.608
  },
  "oklch": {
    "l": 0.31163,
    "c": 0.15457,
    "h": 276.2
  },
  "luminance": 0.02596
}

Semantic roles & 50–950 ramp

primary

#231B7C

secondary

#A7B043

accent

#E741D9

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#08040F

muted

#7B797F

Preview Lab

Preview with #231B7C

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

Preview Lab → · Contrast checker → · Palette generator →