#1730B4#1730B4

#1730B4 is a dark, highly saturated blue. Relative luminance 0.056; OKLCH L 39.9% C 0.207 H 266.5°. Best body text is #FFFFFF at 9.91:1 contrast (WCAG AA passes).

Color values

HEX	#1730B4
RGB	rgb(23, 48, 180)
HSL	hsl(230, 77%, 40%)
HSV	hsv(230, 87%, 71%)
CMYK	cmyk(87.2%, 73.3%, 0%, 29.4%)
CIE-LAB	lab(28.35, 42.04, -71.10)
CIE-LCH	lch(28.35, 82.60, 300.59°)
OKLab	oklab(39.95% -0.0127 -0.2062)
OKLCH	oklch(39.95% 0.207 266.5)
XYZ	xyz(9.6456, 5.5901, 43.7418)
Luminance	0.0559 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1730B4 #B49B17

analogous

#177EB4 #1730B4 #4D17B4

triadic

#1730B4 #B41730 #30B417

tetradic

#1730B4 #B4177E #B49B17 #17B44D

square

#1730B4 #B4177E #B49B17 #17B44D

split-complementary

#1730B4 #B44D17 #7EB417

monochromatic

#091347 #10227E #1730B4 #2543E3 #5B72EA

Accessibility & contrast

On white

9.91

#1730B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.12

#1730B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1730B4

9.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1730B4	#FFFFFF	#000000	##FFFFFF
##1730B4	1.00	9.91	2.12	9.91
#FFFFFF	9.91	1.00	21.00	1.00
#000000	2.12	21.00	1.00	21.00
##FFFFFF	9.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BB8

Deuteranopia (green-blind)

#003BB2

Tritanopia (blue-blind)

#00576F

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1730b4;
/* rgb */ color: rgb(23, 48, 180);
/* oklch */ color: oklch(39.9% 0.207 266.5);

Tailwind

colors: {
  custom: {
    50: '#7669cc',
    500: '#1730b4',
    950: '#000000',
  },
}

SCSS

$custom: #1730b4;
$custom-light: #7669cc;
$custom-dark: #000000;

JSON

{
  "hex": "#1730b4",
  "rgb": {
    "r": 23,
    "g": 48,
    "b": 180
  },
  "hsl": {
    "h": 230.446,
    "s": 77.34,
    "l": 39.804
  },
  "oklch": {
    "l": 0.39949,
    "c": 0.20657,
    "h": 266.5
  },
  "luminance": 0.05591
}

Semantic roles & 50–950 ramp

primary

#1730B4

secondary

#CEBB59

accent

#D534F4

background

#F8F6FC

surface

#EFEBF9

border

#CAC6D2

text

#0B0614

muted

#7C7A82

Preview Lab

Preview with #1730B4

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

Preview Lab → · Contrast checker → · Palette generator →