#1F3BA6#1F3BA6

#1F3BA6 is a dark, vivid blue. Relative luminance 0.062; OKLCH L 40.7% C 0.175 H 266.7°. Best body text is #FFFFFF at 9.40:1 contrast (WCAG AA passes).

Color values

HEX	#1F3BA6
RGB	rgb(31, 59, 166)
HSL	hsl(228, 69%, 39%)
HSV	hsv(228, 81%, 65%)
CMYK	cmyk(81.3%, 64.5%, 0%, 34.9%)
CIE-LAB	lab(29.84, 30.39, -60.26)
CIE-LCH	lch(29.84, 67.49, 296.76°)
OKLab	oklab(40.69% -0.0102 -0.1744)
OKLCH	oklch(40.69% 0.175 266.7)
XYZ	xyz(9.0096, 6.1713, 36.7853)
Luminance	0.0617 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3BA6 #A68A1F

analogous

#1F7EA6 #1F3BA6 #471FA6

triadic

#1F3BA6 #A61F3B #3BA61F

tetradic

#1F3BA6 #A61F7E #A68A1F #1FA647

square

#1F3BA6 #A61F7E #A68A1F #1FA647

split-complementary

#1F3BA6 #A6471F #7EA61F

monochromatic

#0C163F #152972 #1F3BA6 #2B4FD7 #5E79E1

Accessibility & contrast

On white

9.40

#1F3BA6 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.23

#1F3BA6 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3BA6

9.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3BA6	#FFFFFF	#000000	##FFFFFF
##1F3BA6	1.00	9.40	2.23	9.40
#FFFFFF	9.40	1.00	21.00	1.00
#000000	2.23	21.00	1.00	21.00
##FFFFFF	9.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DA9

Deuteranopia (green-blind)

#0040A4

Tritanopia (blue-blind)

#00576B

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #1f3ba6;
/* rgb */ color: rgb(31, 59, 166);
/* oklch */ color: oklch(40.7% 0.175 266.7);

Tailwind

colors: {
  custom: {
    50: '#7370c1',
    500: '#1f3ba6',
    950: '#000000',
  },
}

SCSS

$custom: #1f3ba6;
$custom-light: #7370c1;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3ba6",
  "rgb": {
    "r": 31,
    "g": 59,
    "b": 166
  },
  "hsl": {
    "h": 227.556,
    "s": 68.528,
    "l": 38.627
  },
  "oklch": {
    "l": 0.40691,
    "c": 0.17473,
    "h": 266.7
  },
  "luminance": 0.06172
}

Semantic roles & 50–950 ramp

primary

#1F3BA6

secondary

#C5AF5B

accent

#C73CEB

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #1F3BA6

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

Preview Lab → · Contrast checker → · Palette generator →