#1F538A#1F538A

#1F538A is a dark, moderate cyan. Relative luminance 0.083; OKLCH L 43.7% C 0.106 H 252.6°. Best body text is #FFFFFF at 7.89:1 contrast (WCAG AA passes).

Color values

HEX	#1F538A
RGB	rgb(31, 83, 138)
HSL	hsl(211, 63%, 33%)
HSV	hsv(211, 78%, 54%)
CMYK	cmyk(77.5%, 39.9%, 0%, 45.9%)
CIE-LAB	lab(34.62, 3.12, -35.53)
CIE-LCH	lch(34.62, 35.66, 275.02°)
OKLab	oklab(43.68% -0.0318 -0.1013)
OKLCH	oklch(43.68% 0.106 252.6)
XYZ	xyz(8.2441, 8.3118, 25.2097)
Luminance	0.0831 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F538A #8A561F

analogous

#1F888A #1F538A #201F8A

triadic

#1F538A #8A1F53 #538A1F

tetradic

#1F538A #8A1F88 #8A561F #1F8A20

square

#1F538A #8A1F88 #8A561F #1F8A20

split-complementary

#1F538A #8A201F #888A1F

monochromatic

#091726 #143558 #1F538A #2A71BC #4C90D7

Accessibility & contrast

On white

7.89

#1F538A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.66

#1F538A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F538A

7.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F538A	#FFFFFF	#000000	##FFFFFF
##1F538A	1.00	7.89	2.66	7.89
#FFFFFF	7.89	1.00	21.00	1.00
#000000	2.66	21.00	1.00	21.00
##FFFFFF	7.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#39578C

Deuteranopia (green-blind)

#284D89

Tritanopia (blue-blind)

#006068

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #1f538a;
/* rgb */ color: rgb(31, 83, 138);
/* oklch */ color: oklch(43.7% 0.106 252.6);

Tailwind

colors: {
  custom: {
    50: '#6b82ac',
    500: '#1f538a',
    950: '#000000',
  },
}

SCSS

$custom: #1f538a;
$custom-light: #6b82ac;
$custom-dark: #000000;

JSON

{
  "hex": "#1f538a",
  "rgb": {
    "r": 31,
    "g": 83,
    "b": 138
  },
  "hsl": {
    "h": 210.841,
    "s": 63.314,
    "l": 33.137
  },
  "oklch": {
    "l": 0.43678,
    "c": 0.10621,
    "h": 252.6
  },
  "luminance": 0.08313
}

Semantic roles & 50–950 ramp

primary

#1F538A

secondary

#BA844B

accent

#9641E6

background

#F6F7FA

surface

#ECEEF4

border

#C7C9CE

text

#070A10

muted

#7A7C7F

Preview Lab

Preview with #1F538A

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

Preview Lab → · Contrast checker → · Palette generator →