#1F41BC#1F41BC

#1F41BC is a dark, vivid blue. Relative luminance 0.077; OKLCH L 43.9% C 0.196 H 266.0°. Best body text is #FFFFFF at 8.27:1 contrast (WCAG AA passes).

Color values

HEX	#1F41BC
RGB	rgb(31, 65, 188)
HSL	hsl(227, 72%, 43%)
HSV	hsv(227, 84%, 74%)
CMYK	cmyk(83.5%, 65.4%, 0%, 26.3%)
CIE-LAB	lab(33.35, 34.78, -67.59)
CIE-LCH	lch(33.35, 76.02, 297.23°)
OKLab	oklab(43.89% -0.0138 -0.1958)
OKLCH	oklch(43.89% 0.196 266)
XYZ	xyz(11.5293, 7.7013, 48.4461)
Luminance	0.0770 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F41BC #BC9A1F

analogous

#1F90BC #1F41BC #4B1FBC

triadic

#1F41BC #BC1F41 #41BC1F

tetradic

#1F41BC #BC1F90 #BC9A1F #1FBC4B

square

#1F41BC #BC1F90 #BC9A1F #1FBC4B

split-complementary

#1F41BC #BC4B1F #90BC1F

monochromatic

#0E1D53 #162F87 #1F41BC #3A5DDE #6E88E7

Accessibility & contrast

On white

8.27

#1F41BC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.54

#1F41BC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F41BC

8.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F41BC	#FFFFFF	#000000	##FFFFFF
##1F41BC	1.00	8.27	2.54	8.27
#FFFFFF	8.27	1.00	21.00	1.00
#000000	2.54	21.00	1.00	21.00
##FFFFFF	8.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056C0

Deuteranopia (green-blind)

#0047BA

Tritanopia (blue-blind)

#006278

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #1f41bc;
/* rgb */ color: rgb(31, 65, 188);
/* oklch */ color: oklch(43.9% 0.196 266.0);

Tailwind

colors: {
  custom: {
    50: '#7875d1',
    500: '#1f41bc',
    950: '#000000',
  },
}

SCSS

$custom: #1f41bc;
$custom-light: #7875d1;
$custom-dark: #000000;

JSON

{
  "hex": "#1f41bc",
  "rgb": {
    "r": 31,
    "g": 65,
    "b": 188
  },
  "hsl": {
    "h": 227.006,
    "s": 71.689,
    "l": 42.941
  },
  "oklch": {
    "l": 0.43893,
    "c": 0.19631,
    "h": 266
  },
  "luminance": 0.07703
}

Semantic roles & 50–950 ramp

primary

#1F41BC

secondary

#CDB869

accent

#C739EE

background

#F8F7FD

surface

#EFEDFA

border

#CAC8D3

text

#0B0814

muted

#7C7B83

Preview Lab

Preview with #1F41BC

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

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