#1C3F8E#1C3F8E

#1C3F8E is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.2% C 0.138 H 263.4°. Best body text is #FFFFFF at 9.76:1 contrast (WCAG AA passes).

Color values

HEX	#1C3F8E
RGB	rgb(28, 63, 142)
HSL	hsl(222, 67%, 33%)
HSV	hsv(222, 80%, 56%)
CMYK	cmyk(80.3%, 55.6%, 0%, 44.3%)
CIE-LAB	lab(28.78, 17.91, -47.37)
CIE-LCH	lch(28.78, 50.65, 290.71°)
OKLab	oklab(39.24% -0.0158 -0.1366)
OKLCH	oklch(39.24% 0.138 263.4)
XYZ	xyz(7.1371, 5.7541, 26.3204)
Luminance	0.0575 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C3F8E #8E6B1C

analogous

#1C788E #1C3F8E #321C8E

triadic

#1C3F8E #8E1C3F #3F8E1C

tetradic

#1C3F8E #8E1C78 #8E6B1C #1C8E32

square

#1C3F8E #8E1C78 #8E6B1C #1C8E32

split-complementary

#1C3F8E #8E321C #788E1C

monochromatic

#081228 #12285B #1C3F8E #2656C1 #4976DB

Accessibility & contrast

On white

9.76

#1C3F8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.15

#1C3F8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C3F8E

9.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C3F8E	#FFFFFF	#000000	##FFFFFF
##1C3F8E	1.00	9.76	2.15	9.76
#FFFFFF	9.76	1.00	21.00	1.00
#000000	2.15	21.00	1.00	21.00
##FFFFFF	9.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004991

Deuteranopia (green-blind)

#003F8C

Tritanopia (blue-blind)

#005260

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #1c3f8e;
/* rgb */ color: rgb(28, 63, 142);
/* oklch */ color: oklch(39.2% 0.138 263.4);

Tailwind

colors: {
  custom: {
    50: '#6b73b0',
    500: '#1c3f8e',
    950: '#000000',
  },
}

SCSS

$custom: #1c3f8e;
$custom-light: #6b73b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1c3f8e",
  "rgb": {
    "r": 28,
    "g": 63,
    "b": 142
  },
  "hsl": {
    "h": 221.579,
    "s": 67.059,
    "l": 33.333
  },
  "oklch": {
    "l": 0.39239,
    "c": 0.13753,
    "h": 263.4
  },
  "luminance": 0.05755
}

Semantic roles & 50–950 ramp

primary

#1C3F8E

secondary

#BD9949

accent

#B53EEA

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080810

muted

#7B7B7F

Preview Lab

Preview with #1C3F8E

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

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