#1F33B4#1F33B4

#1F33B4 is a dark, highly saturated blue. Relative luminance 0.060; OKLCH L 40.7% C 0.202 H 267.9°. Best body text is #FFFFFF at 9.59:1 contrast (WCAG AA passes).

Color values

HEX	#1F33B4
RGB	rgb(31, 51, 180)
HSL	hsl(232, 71%, 41%)
HSV	hsv(232, 83%, 71%)
CMYK	cmyk(82.8%, 71.7%, 0%, 29.4%)
CIE-LAB	lab(29.29, 40.69, -69.54)
CIE-LCH	lch(29.29, 80.57, 300.33°)
OKLab	oklab(40.7% -0.0075 -0.2015)
OKLCH	oklch(40.7% 0.202 267.9)
XYZ	xyz(9.9843, 5.9530, 43.7940)
Luminance	0.0595 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F33B4 #B4A01F

analogous

#1F7EB4 #1F33B4 #561FB4

triadic

#1F33B4 #B41F33 #33B41F

tetradic

#1F33B4 #B41F7E #B4A01F #1FB456

square

#1F33B4 #B41F7E #B4A01F #1FB456

split-complementary

#1F33B4 #B4561F #7EB41F

monochromatic

#0D154C #162480 #1F33B4 #344BDC #6879E5

Accessibility & contrast

On white

9.59

#1F33B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.19

#1F33B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F33B4

9.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F33B4	#FFFFFF	#000000	##FFFFFF
##1F33B4	1.00	9.59	2.19	9.59
#FFFFFF	9.59	1.00	21.00	1.00
#000000	2.19	21.00	1.00	21.00
##FFFFFF	9.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CB8

Deuteranopia (green-blind)

#003EB2

Tritanopia (blue-blind)

#005870

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #1f33b4;
/* rgb */ color: rgb(31, 51, 180);
/* oklch */ color: oklch(40.7% 0.202 267.9);

Tailwind

colors: {
  custom: {
    50: '#776bcc',
    500: '#1f33b4',
    950: '#000000',
  },
}

SCSS

$custom: #1f33b4;
$custom-light: #776bcc;
$custom-dark: #000000;

JSON

{
  "hex": "#1f33b4",
  "rgb": {
    "r": 31,
    "g": 51,
    "b": 180
  },
  "hsl": {
    "h": 231.946,
    "s": 70.616,
    "l": 41.373
  },
  "oklch": {
    "l": 0.40704,
    "c": 0.20168,
    "h": 267.9
  },
  "luminance": 0.05954
}

Semantic roles & 50–950 ramp

primary

#1F33B4

secondary

#CBBD64

accent

#D53AED

background

#F8F6FC

surface

#EFEBF9

border

#CAC6D2

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #1F33B4

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

Preview Lab → · Contrast checker → · Palette generator →