#1F52A5#1F52A5

#1F52A5 is a mid, vivid blue. Relative luminance 0.090; OKLCH L 45.4% C 0.145 H 259.8°. Best body text is #FFFFFF at 7.48:1 contrast (WCAG AA passes).

Color values

HEX	#1F52A5
RGB	rgb(31, 82, 165)
HSL	hsl(217, 68%, 38%)
HSV	hsv(217, 81%, 65%)
CMYK	cmyk(81.2%, 50.3%, 0%, 35.3%)
CIE-LAB	lab(36.06, 14.52, -49.53)
CIE-LCH	lch(36.06, 51.62, 286.33°)
OKLab	oklab(45.35% -0.0255 -0.1425)
OKLCH	oklch(45.35% 0.145 259.8)
XYZ	xyz(10.3714, 9.0413, 36.7885)
Luminance	0.0904 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F52A5 #A5721F

analogous

#1F95A5 #1F52A5 #2F1FA5

triadic

#1F52A5 #A51F52 #52A51F

tetradic

#1F52A5 #A51F95 #A5721F #1FA52F

square

#1F52A5 #A51F95 #A5721F #1FA52F

split-complementary

#1F52A5 #A52F1F #95A51F

monochromatic

#0C1F3E #153871 #1F52A5 #2A6CD7 #5E90E1

Accessibility & contrast

On white

7.48

#1F52A5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.81

#1F52A5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F52A5

7.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F52A5	#FFFFFF	#000000	##FFFFFF
##1F52A5	1.00	7.48	2.81	7.48
#FFFFFF	7.48	1.00	21.00	1.00
#000000	2.81	21.00	1.00	21.00
##FFFFFF	7.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F5BA8

Deuteranopia (green-blind)

#004FA3

Tritanopia (blue-blind)

#006673

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #1f52a5;
/* rgb */ color: rgb(31, 82, 165);
/* oklch */ color: oklch(45.4% 0.145 259.8);

Tailwind

colors: {
  custom: {
    50: '#7182c0',
    500: '#1f52a5',
    950: '#000000',
  },
}

SCSS

$custom: #1f52a5;
$custom-light: #7182c0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f52a5",
  "rgb": {
    "r": 31,
    "g": 82,
    "b": 165
  },
  "hsl": {
    "h": 217.164,
    "s": 68.367,
    "l": 38.431
  },
  "oklch": {
    "l": 0.45352,
    "c": 0.14482,
    "h": 259.8
  },
  "luminance": 0.09043
}

Semantic roles & 50–950 ramp

primary

#1F52A5

secondary

#C59D5B

accent

#A93DEB

background

#F7F7FB

surface

#EDEEF7

border

#C8C9D0

text

#090A12

muted

#7B7C81

Preview Lab

Preview with #1F52A5

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

Preview Lab → · Contrast checker → · Palette generator →