#1931B4#1931B4

#1931B4 is a dark, highly saturated blue. Relative luminance 0.057; OKLCH L 40.2% C 0.205 H 266.8°. Best body text is #FFFFFF at 9.81:1 contrast (WCAG AA passes).

Color values

HEX	#1931B4
RGB	rgb(25, 49, 180)
HSL	hsl(231, 76%, 40%)
HSV	hsv(231, 86%, 71%)
CMYK	cmyk(86.1%, 72.8%, 0%, 29.4%)
CIE-LAB	lab(28.64, 41.54, -70.63)
CIE-LCH	lch(28.64, 81.94, 300.46°)
OKLab	oklab(40.17% -0.0115 -0.2048)
OKLCH	oklch(40.17% 0.205 266.8)
XYZ	xyz(9.7346, 5.6974, 43.7578)
Luminance	0.0570 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 7.03

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1931B4 #B49C19

analogous

#197EB4 #1931B4 #4F19B4

triadic

#1931B4 #B41931 #31B419

tetradic

#1931B4 #B4197E #B49C19 #19B44F

square

#1931B4 #B4197E #B49C19 #19B44F

split-complementary

#1931B4 #B44F19 #7EB419

monochromatic

#0A1449 #12227E #1931B4 #2945E1 #5F74E9

Accessibility & contrast

On white

9.81

#1931B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.14

#1931B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1931B4

9.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1931B4	#FFFFFF	#000000	##FFFFFF
##1931B4	1.00	9.81	2.14	9.81
#FFFFFF	9.81	1.00	21.00	1.00
#000000	2.14	21.00	1.00	21.00
##FFFFFF	9.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BB8

Deuteranopia (green-blind)

#003CB2

Tritanopia (blue-blind)

#00576F

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #1931b4;
/* rgb */ color: rgb(25, 49, 180);
/* oklch */ color: oklch(40.2% 0.205 266.8);

Tailwind

colors: {
  custom: {
    50: '#766acc',
    500: '#1931b4',
    950: '#000000',
  },
}

SCSS

$custom: #1931b4;
$custom-light: #766acc;
$custom-dark: #000000;

JSON

{
  "hex": "#1931b4",
  "rgb": {
    "r": 25,
    "g": 49,
    "b": 180
  },
  "hsl": {
    "h": 230.71,
    "s": 75.61,
    "l": 40.196
  },
  "oklch": {
    "l": 0.40169,
    "c": 0.20512,
    "h": 266.8
  },
  "luminance": 0.05699
}

Semantic roles & 50–950 ramp

primary

#1931B4

secondary

#CDBB5C

accent

#D536F2

background

#F8F6FC

surface

#EFEBF9

border

#CAC6D2

text

#0B0614

muted

#7C7A82

Preview Lab

Preview with #1931B4

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

Preview Lab → · Contrast checker → · Palette generator →