#231B70#231B70

#231B70 is a dark, vivid blue. Relative luminance 0.023; OKLCH L 29.8% C 0.139 H 278.1°. Best body text is #FFFFFF at 14.36:1 contrast (WCAG AA passes).

Color values

HEX	#231B70
RGB	rgb(35, 27, 112)
HSL	hsl(246, 61%, 27%)
HSV	hsv(246, 76%, 44%)
CMYK	cmyk(68.8%, 75.9%, 0%, 56.1%)
CIE-LAB	lab(17.04, 31.63, -47.60)
CIE-LCH	lch(17.04, 57.15, 303.61°)
OKLab	oklab(29.85% 0.0195 -0.1374)
OKLCH	oklch(29.85% 0.139 278.1)
XYZ	xyz(4.0088, 2.3107, 15.5608)
Luminance	0.0231 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231B70 #68701B

analogous

#1B3E70 #231B70 #4E1B70

triadic

#231B70 #70231B #1B7023

tetradic

#231B70 #701B3E #68701B #1B704E

square

#231B70 #701B3E #68701B #1B704E

split-complementary

#231B70 #704E1B #3E701B

monochromatic

#080619 #140F3F #231B70 #3227A1 #4537CF

Accessibility & contrast

On white

14.36

#231B70 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.46

#231B70 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231B70

14.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231B70	#FFFFFF	#000000	##FFFFFF
##231B70	1.00	14.36	1.46	14.36
#FFFFFF	14.36	1.00	21.00	1.00
#000000	1.46	21.00	1.00	21.00
##FFFFFF	14.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002D73

Deuteranopia (green-blind)

#00266E

Tritanopia (blue-blind)

#003343

Achromatopsia (no color)

#2A2A2A

Design tokens & code

CSS

--color: #231b70;
/* rgb */ color: rgb(35, 27, 112);
/* oklch */ color: oklch(29.8% 0.139 278.1);

Tailwind

colors: {
  custom: {
    50: '#6a599a',
    500: '#231b70',
    950: '#000000',
  },
}

SCSS

$custom: #231b70;
$custom-light: #6a599a;
$custom-dark: #000000;

JSON

{
  "hex": "#231b70",
  "rgb": {
    "r": 35,
    "g": 27,
    "b": 112
  },
  "hsl": {
    "h": 245.647,
    "s": 61.151,
    "l": 27.255
  },
  "oklch": {
    "l": 0.29846,
    "c": 0.13881,
    "h": 278.1
  },
  "luminance": 0.02311
}

Semantic roles & 50–950 ramp

primary

#231B70

secondary

#9BA542

accent

#E444D5

background

#F6F5F9

surface

#ECE9F2

border

#C7C5CC

text

#07030E

muted

#7A787E

Preview Lab

Preview with #231B70

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

Preview Lab → · Contrast checker → · Palette generator →