#1C277B#1C277B

#1C277B is a dark, vivid blue. Relative luminance 0.031; OKLCH L 32.6% C 0.141 H 270.3°. Best body text is #FFFFFF at 12.92:1 contrast (WCAG AA passes).

Color values

HEX	#1C277B
RGB	rgb(28, 39, 123)
HSL	hsl(233, 63%, 30%)
HSV	hsv(233, 77%, 48%)
CMYK	cmyk(77.2%, 68.3%, 0%, 51.8%)
CIE-LAB	lab(20.55, 27.00, -48.92)
CIE-LCH	lch(20.55, 55.88, 298.90°)
OKLab	oklab(32.59% 0.0009 -0.1415)
OKLCH	oklch(32.59% 0.141 270.3)
XYZ	xyz(4.7783, 3.1275, 19.0869)
Luminance	0.0313 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C277B #7B701C

analogous

#1C567B #1C277B #411C7B

triadic

#1C277B #7B1C27 #277B1C

tetradic

#1C277B #7B1C56 #7B701C #1C7B41

square

#1C277B #7B1C56 #7B701C #1C7B41

split-complementary

#1C277B #7B411C #567B1C

monochromatic

#060819 #111749 #1C277B #2737AD #3E50D3

Accessibility & contrast

On white

12.92

#1C277B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.63

#1C277B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C277B

12.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C277B	#FFFFFF	#000000	##FFFFFF
##1C277B	1.00	12.92	1.63	12.92
#FFFFFF	12.92	1.00	21.00	1.00
#000000	1.63	21.00	1.00	21.00
##FFFFFF	12.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00367E

Deuteranopia (green-blind)

#002D79

Tritanopia (blue-blind)

#003D4D

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #1c277b;
/* rgb */ color: rgb(28, 39, 123);
/* oklch */ color: oklch(32.6% 0.141 270.3);

Tailwind

colors: {
  custom: {
    50: '#6861a2',
    500: '#1c277b',
    950: '#000000',
  },
}

SCSS

$custom: #1c277b;
$custom-light: #6861a2;
$custom-dark: #000000;

JSON

{
  "hex": "#1c277b",
  "rgb": {
    "r": 28,
    "g": 39,
    "b": 123
  },
  "hsl": {
    "h": 233.053,
    "s": 62.914,
    "l": 29.608
  },
  "oklch": {
    "l": 0.3259,
    "c": 0.14148,
    "h": 270.3
  },
  "luminance": 0.03128
}

Semantic roles & 50–950 ramp

primary

#1C277B

secondary

#AFA244

accent

#D342E6

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07050F

muted

#7A797F

Preview Lab

Preview with #1C277B

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

Preview Lab → · Contrast checker → · Palette generator →