#1F539E#1F539E

#1F539E is a mid, vivid blue. Relative luminance 0.089; OKLCH L 45.1% C 0.134 H 258.2°. Best body text is #FFFFFF at 7.53:1 contrast (WCAG AA passes).

Color values

HEX	#1F539E
RGB	rgb(31, 83, 158)
HSL	hsl(215, 67%, 37%)
HSV	hsv(215, 80%, 62%)
CMYK	cmyk(80.4%, 47.5%, 0%, 38%)
CIE-LAB	lab(35.88, 11.06, -45.64)
CIE-LCH	lch(35.88, 46.96, 283.63°)
OKLab	oklab(45.06% -0.0274 -0.1311)
OKLCH	oklch(45.06% 0.134 258.2)
XYZ	xyz(9.8276, 8.9453, 33.5498)
Luminance	0.0895 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F539E #9E6A1F

analogous

#1F939E #1F539E #2A1F9E

triadic

#1F539E #9E1F53 #539E1F

tetradic

#1F539E #9E1F93 #9E6A1F #1F9E2A

square

#1F539E #9E1F93 #9E6A1F #1F9E2A

split-complementary

#1F539E #9E2A1F #939E1F

monochromatic

#0B1D38 #15386B #1F539E #296ED1 #5990DE

Accessibility & contrast

On white

7.53

#1F539E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.79

#1F539E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F539E

7.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F539E	#FFFFFF	#000000	##FFFFFF
##1F539E	1.00	7.53	2.79	7.53
#FFFFFF	7.53	1.00	21.00	1.00
#000000	2.79	21.00	1.00	21.00
##FFFFFF	7.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A5BA1

Deuteranopia (green-blind)

#054F9D

Tritanopia (blue-blind)

#006571

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #1f539e;
/* rgb */ color: rgb(31, 83, 158);
/* oklch */ color: oklch(45.1% 0.134 258.2);

Tailwind

colors: {
  custom: {
    50: '#6f82bb',
    500: '#1f539e',
    950: '#000000',
  },
}

SCSS

$custom: #1f539e;
$custom-light: #6f82bb;
$custom-dark: #000000;

JSON

{
  "hex": "#1f539e",
  "rgb": {
    "r": 31,
    "g": 83,
    "b": 158
  },
  "hsl": {
    "h": 215.433,
    "s": 67.196,
    "l": 37.059
  },
  "oklch": {
    "l": 0.45057,
    "c": 0.1339,
    "h": 258.2
  },
  "luminance": 0.08946
}

Semantic roles & 50–950 ramp

primary

#1F539E

secondary

#C29656

accent

#A43EEA

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090A12

muted

#7B7C81

Preview Lab

Preview with #1F539E

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

Preview Lab → · Contrast checker → · Palette generator →