#1F579B#1F579B

#1F579B is a mid, vivid cyan. Relative luminance 0.095; OKLCH L 45.8% C 0.125 H 255.4°. Best body text is #FFFFFF at 7.25:1 contrast (WCAG AA passes).

Color values

HEX	#1F579B
RGB	rgb(31, 87, 155)
HSL	hsl(213, 67%, 36%)
HSV	hsv(213, 80%, 61%)
CMYK	cmyk(80%, 43.9%, 0%, 39.2%)
CIE-LAB	lab(36.88, 7.22, -42.23)
CIE-LCH	lch(36.88, 42.84, 279.71°)
OKLab	oklab(45.77% -0.0314 -0.1209)
OKLCH	oklch(45.77% 0.125 255.4)
XYZ	xyz(9.8875, 9.4731, 32.3114)
Luminance	0.0947 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F579B #9B631F

analogous

#1F959B #1F579B #251F9B

triadic

#1F579B #9B1F57 #579B1F

tetradic

#1F579B #9B1F95 #9B631F #1F9B25

square

#1F579B #9B1F95 #9B631F #1F9B25

split-complementary

#1F579B #9B251F #959B1F

monochromatic

#0B1E35 #153A68 #1F579B #2974CE #5794DD

Accessibility & contrast

On white

7.25

#1F579B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.89

#1F579B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F579B

7.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F579B	#FFFFFF	#000000	##FFFFFF
##1F579B	1.00	7.25	2.89	7.25
#FFFFFF	7.25	1.00	21.00	1.00
#000000	2.89	21.00	1.00	21.00
##FFFFFF	7.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#355D9E

Deuteranopia (green-blind)

#1D529A

Tritanopia (blue-blind)

#006771

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #1f579b;
/* rgb */ color: rgb(31, 87, 155);
/* oklch */ color: oklch(45.8% 0.125 255.4);

Tailwind

colors: {
  custom: {
    50: '#6f85b9',
    500: '#1f579b',
    950: '#000000',
  },
}

SCSS

$custom: #1f579b;
$custom-light: #6f85b9;
$custom-dark: #000000;

JSON

{
  "hex": "#1f579b",
  "rgb": {
    "r": 31,
    "g": 87,
    "b": 155
  },
  "hsl": {
    "h": 212.903,
    "s": 66.667,
    "l": 36.471
  },
  "oklch": {
    "l": 0.45769,
    "c": 0.12497,
    "h": 255.4
  },
  "luminance": 0.09474
}

Semantic roles & 50–950 ramp

primary

#1F579B

secondary

#C19055

accent

#9C3EEA

background

#F7F8FB

surface

#EDEFF6

border

#C8CAD0

text

#080B11

muted

#7B7C80

Preview Lab

Preview with #1F579B

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

Preview Lab → · Contrast checker → · Palette generator →